magneticadj.n.
/maɡˈnɛtɪk/, U.S. /mæɡˈnɛdɪk/ A. adj.
1. Having powers of attraction regarded as similar to those of a magnet; very attractive or alluring. Also with †of, to.
ΘΚΠ
the mind > will > motivation > attraction, allurement, or enticement > [adjective]
tolling?c1225
ticinga1400
allectivec1487
illecebrous1531
alluring1534
tracting1535
wooing1549
enticing1553
training1557
tittling1560
luring1570
adamantine1581
baiting1585
winning1596
attractive1600
adamantic1605
adamantive1605
enticeable1607
soliciting1608
magnetic1611
invitinga1616
allurant1631
inescating1633
invitative1634
magnetical1638
invitatory1646
tractive1658
odalisque1837
Pied Piper1869
lureful1887
follow-me1888
luresome1889
come-hitherish1901
come-hither1905
come-hithery1919
invitational1922
come-hithering1935
1611 J. Donne Anat. World sig. B She that had all Magnetique force alone, To draw, and fasten sundred parts in one.
a1637 B. Jonson in Wks. (1640) III, (title) The magnetick lady.
1638 T. Herbert Some Yeares Trav. (rev. ed.) 55 Turk, Jew, and others, drawne thither by the magnetick power of gaine.
1658 J. Rowland Topsell's Hist. Four-footed Beasts (rev. ed.) New Ded. Ep. sig. A3 There is such a magnetick force in Goodness, that it draws the hearts of men after it.
1667 E. Waterhouse Short Narr. Fire London 107 Whose appositeness for Trade, was Magnetique of all Nations and Merchandises to it.
1778 F. Burney Evelina I. xxiii. 186 The magnetic power of beauty.
1845 M. Pattison in Christian Remembrancer Jan. 72 That magnetic influence which irresistibly draws our feet to spots on which our imagination has long fed.
1864 Ld. Tennyson Aylmer's Field in Enoch Arden, etc. 83 His face magnetic to the hand from which Livid he pluck'd it forth.
1880 Spectator 3 Nov. 1437 The Americans have invented, and Englishmen are slowly adopting into their political vocabulary, a new word, intended to account for the otherwise unaccountable popularity of some politicians. They say they are ‘magnetic’.
1901 Scotsman 7 Oct. 2/7 I found him one of the most magnetic and companionable of men.
1926 Travel Nov. 56/1 (advt.) One of the most magnetic short sea trips in the world—a special Cunard Cruise over Christmas and New Year.
1990 N.Y. Mag. 11 June 107/1 Victoria Abril is a porno actress imprisoned in her Madrid apartment by a magnetic young psychopath.
2.
a. Having the properties of a magnet; of or relating to a magnet or magnetism; producing, caused by, or operating by means of magnetism.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [adjective]
magnetical1581
magnetic1634
magnetish1683
1634 W. Habington Castara i. 9 Why doth the stubborne iron prove So gentle to th' magnetique stone?
1635 F. Quarles Emblemes i. xiii. 54 Like as the am'rous needle joyes to bend To her Magneticke Friend.
1647 H. More Philos. Poems Notes 385 Let the arrow K keep in BC the same line of the air or earthly magnetick spirit.
1796 H. Hunter tr. J.-H. B. de Saint-Pierre Stud. Nature (1799) I. 64 Metals, which have magnetic powers, most of which are still unknown to us.
1796 R. Kirwan Elements Mineral. (ed. 2) II. 158 Common Magnetic Iron Ore.
1796 R. Kirwan Elements Mineral. (ed. 2) II. 161 Magnetic Sand.
1851 W. B. Carpenter Man. Physiol. (ed. 2) 12 (note) When iron rails, pokers, &c. become magnetic by the influence of the earth.
1884 A. Daniell Text-bk. Princ. Physics xvi. 609 When an iron or cobalt bar is magnetised it..emits a slight sound—a ‘magnetic tick’.
1926 Jrnl. Iron & Steel Inst. 114 112 The concentrate from the magnetic separation is always mixed with much water, and cannot on that account be directly used.
1954 Electronic Engin. 26 196 Magnetic toroids could..be used..for random access information storage at the rate of one core per digit.
1966 A. Battersby Math. in Managem. viii. 200 An alternative to optical scanning is to use characters printed in magnetic ink.
1992 Oxfordshire Bull. Nov. 2/2 A Saxon slow-down in alluviation, demonstrated by magnetic dating of sediments at Drayton, reflects the post-Roman decline in population.
b. Designating a healing plaster which (supposedly) contained lodestone (magnetite) and was regarded as having occult power. Now historical.
ΘΚΠ
the world > health and disease > healing > medical appliances or equipment > equipment for treating wound or ulcer > [adjective] > poultice or plaster
cataplasmical1630
magnetic1658
cataplasmic1689
1658 W. Johnson tr. F. Würtz Surgeons Guid ii. x. 86 Then is it requisite, that you have a good Medicine, which penetrate with its vertue, and that is the Magnetick plaister.
1658 tr. S. de Cyrano de Bergerac Satyrical Characters xii. 47 I teach them to find..the magnetique plaster.
1671 W. Salmon Synopsis Medicinæ iii. lxxvii. 675 Apply the magnetick Emplaster..till it [sc. the wound] is sufficiently cleansed.
1996 P. Fara Sympathetic Attractions vi. 150 Therapists prescribed arsenical magnets.., or soothed injuries with magnetic plasters—only some of which included powdered loadstone.
c. Of a person: knowledgeable about magnetism or who makes magnetic observations or measurements. Now historical.
ΚΠ
1664 H. Power Exper. Philos. iii. 160 Take a wedge of Iron..and heating it red-hot, you shall, according to the Laws in its refrigeration, endue it with a polary verticity, as has been praeobserved by the Magnetick Writers.
1900 Dict. National Biogr. at Whipple, George Mathews Kew Observatory..of which he became magnetic assistant in 1862.
1964 Amer. Hist. Rev. 70 236 The famous Report..consists of a series of ‘journals, detailed reports, and observations’, recorded not only by Palliser himself but by his colleagues, Hector, the physician–geologist..and Thomas Blakiston of the Royal Artillery, the magnetic observer.
1993 Dict. National Biogr.: Missing Persons 143/1 A chance meeting..led to Colbeck's joining the Southern Cross expedition..as magnetic observer.
d. Relating to attractive forces formerly confused or identified with magnetism. Cf. magnetical adj. 1c. Now historical.
ΘΚΠ
the world > matter > physics > mechanics > force > [adjective] > attractive
magnetical1626
magnetic1667
1667 J. Milton Paradise Lost iii. 583 They [sc. the Constellations]..towards his all-chearing Lamp Turn swift their various motions, or are turnd By his Magnetic beam. View more context for this quotation
1996 P. Fara Sympathetic Attractions vi. 149 At the end of the [eighteenth] century, authors still reiterated verbally Kircher's magnetic imagery of sympathetic plants and animals.
e. Nautical and Aeronautics. Esp. of an azimuth or compass bearing: measured relative to magnetic north (opposed to true). Also as postmodifier. Cf. magnetic course n. at Compounds.
ΘΚΠ
the world > the earth > geodetic references > [adjective] > pole > measured by magnetic north (of bearing)
magnetic1697
1633 T. James Strange Voy. Names Instruments sig. Q2v The Magneticall Azimuths.]
1697 Philos. Trans. 1695–7 (Royal Soc.) 19 630 I am upon shewing an Error that arises from judging of the Line P Q by Magnetick bearing.
1744 W. Mountaine Atkinson's Epitome Art Navigation (rev. ed.) x. 257 In the Afternoon let the Sun's true Azimuth be 115 Degrees and the Magnetic Azimuth 101 Degrees.
1772 J. H. Moore Pract. Navigator 179 The Magnetic Azimuth is an Arch of the Horizon contained between the Sun's Azimuth Circle and the Magnetic Meridian.
1791 Philos. Trans. (Royal Soc.) 81 132 This is proved by comparing his magnetic bearing line between those places, with that given by the difference in latitude.
1850 J. Greenwood Sailor's Sea-bk. i. 6 This last is called the true course; while e. s. e.¼ s. is the compass or magnetic course.
1896 V. J. English Navigation for Yachtsmen ix. 81 The correct magnetic course is the angle between the direction of a ship's head and the magnetic meridian, or line passing through the place of the ship and the magnetic pole.
1930 F. Chichester Solo to Sydney iii. 41 I went over them all [sc. strip-maps], first marking the magnetic variation every few hundred miles, next working out the magnetic bearing of each change in direction.
1958 ‘N. Shute’ Rainbow & Rose ii. 39 I..laid out the course upon my map... It was about a hundred and fifteen miles, course 178 degrees magnetic, practically due south.
1983 Boating Apr. 100/1 Distances are nautical miles, bearings in degrees (magnetic or true), and time in hours and minutes.
f. Capable of being magnetized or of being attracted by a magnet; capable of undergoing alignment of electron spins.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [adjective] > capable of magnetism
magnetizable1797
magnetic1811
1811 Statist. Acct. Towns & Parishes Connecticut (Conn. Acad. Arts & Sci.) 10 The beach is covered with magnetic iron sand; uncommonly pure, and very sensible to the magnet.
1837 D. Brewster Treat. Magnetism 9 He [sc. Gilbert c1600] applies the term magnetic to all bodies which are acted upon by load~stones and magnets.
1846 M. Faraday in Philos. Trans. (Royal Soc.) 136 42 The metals which are magnetic retain a portion of their power after the great change has been effected.
1866 H. E. Roscoe Lessons Elem. Chem. xxii. 194 Ferrous oxide and the ferrous salts are magnetic.
1907 Athenæum 20 Apr. 479/1 Most of his researches have been made with crystals of xenotime (a magnetic phosphate of yttrium).
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) XI. 130/1 Pyrrhotite is one of the few minerals that are magnetic; that is, it will be attracted to the ordinary magnet.
3. Relating to animal magnetism; mesmeric. Now historical.
ΘΚΠ
the world > the supernatural > the paranormal > [adjective] > relating to mesmerism
magnetical1794
magnetic1800
mesmerian1820
mesmeric1829
mesmerical1852
statuvolic1871
biological1874
post-hypnotic1887
1800 Med. & Physical Jrnl. 4 130 The magnetic influence of Mesmer.
1834 Penny Cycl. II. 33/1 The mode of bringing the magnetised under the influence of the magnetic fluid was peculiar.
1839 C. Dickens Nicholas Nickleby vii. 63 As if he had been in a magnetic slumber.
1855 E. Smedley et al. Occult Sci. 222 The magnetic awakening in the body.
1891 New Englander (New Haven, Connecticut) 54 25 To accommodate the crowds who sought the supposed benefits of animal magnetism trees were magnetized by the doctors. About these trees patients sat in rows—holding on to cords that were attached to the trunk—and supposed that through these cords they were receiving the magnetic fluid.
1910 Amer. Hist. Rev. 15 898 These data would go far to explain the subject's treatment for spinal trouble under the magnetic healer P. P. Quimby.
1996 P. Fara Sympathetic Attractions vii. 197 The most famous animal magnetizer was John de Mainauduc, who repeatedly dissociated himself from the discredited Mesmer, his baquet, and all other magnetic equipment.
1999 Isis 90 578/2 Mesmer and his followers believed that the trance was produced by a ‘magnetic fluid’ that physically, not mystically, passed from the practitioner to the patient.
1. = magnet n. 2a. Also figurative = magnet n. 3. Obsolete.
ΘΚΠ
the mind > will > motivation > attraction, allurement, or enticement > [noun] > one who or that which > that which
lurec1385
baitc1400
traina1425
allective1445
allurement1548
lodestone?1577
attractive1581
invites1615
magnetic1645
magnet1655
invitatory1666
track1672
glittering prize1713
catch1781
the rainbow's end1846
carrot1895
come-on1902
the world > matter > physics > electromagnetic radiation > magnetism > magnetic devices or materials > [noun] > a magnet
magnet1613
magnetic1645
1645 Char. Oxf.-incendiary 7 A Charme for the Gout, or an Ague, beyond all the Magneticks in Chymistry.
1655 H. L'Estrange Reign King Charles 60 They [sc. alliances between princes] are not souldered by any magnetique of Love.
1658 J. Webb tr. G. de Costes de La Calprenède Hymen's Præludia: 8th Pt. viii. ii. 20 Retiring her eyes from a magnetick which even forceably attracted them.
1671 J. Milton Paradise Regain'd ii. 168 Such object hath the power to..lead At will the manliest, resolutest brest, As the Magnetic hardest Iron draws. View more context for this quotation
2.
a. A metal that can be magnetized. Obsolete. rare.Apparently only attested in dictionaries or glossaries.
ΚΠ
1854 Webster's Amer. Dict. Eng. Lang. Magnetic n., a term applied to any metal, as iron, nickel, cobalt, &c., which may receive..the properties of the loadstone.
b. A body which is magnetic but not diamagnetic (cf. paramagnetic adj. 1). Obsolete.
ΚΠ
1875 E. H. Knight Amer. Mech. Dict. II. 1371/1 We are indebted to Faraday for the comprehensive classification of all substances into magnetics and diamagnetics.
1890 Cent. Dict. Magnetic,..a paramagnetic body.
Compounds
magnetic anomaly n. a local deviation from the general pattern of the earth's magnetic field.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > earth magnetism > [noun] > local variation
magnetic anomaly1899
magnetic variation1937
1899 Jrnl. Brit. Astron. Assoc. 9 134 (heading) Magnetic anomalies in Russia.
1929 A. S. Eve & D. A. Keys Appl. Geophysics ii. 38 Three auxiliary magnets of different strengths are usually carried in order to provide for the measurement of large magnetic anomalies and thus extend the range of measurement.
1971 Nature 5 Feb. 374/2 The magnetic evidence for seafloor spreading is based on the pattern of the linear magnetic anomalies which lie over and to the sides of mid-oceanic ridges.
1992 S. Logie Winging It iii. 50 CAE..did a very nice business in airborne magnetic anomaly detection equipment.
magnetic axis n. the axis joining the poles of a magnetized body, spec. that joining the earth's magnetic poles.
ΚΠ
1853 E. K. Kane U.S. Grinnell Exped. 318 The same law of correspondence, which marks the centre of the segment in or about the magnetic axis, gave to us..the strange spectacle of a complete arch passing through or near the zenith.
1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) iii. 45 A body would..be magnetized in such a way that its magnetic axis would lie in the direction of the magnetic field.
1935 C. J. Smith Intermediate Physics (ed. 2) xli. 682 The magnetic axis and equator do not coincide with the corresponding geographical positions.
1981 M. S. Longair High Energy Astrophysics xvi. 221 The simplest solution is that the magnetic axis of the pulsar is not aligned with the rotation axis.
1996 Physics of Plasmas 3 3397 (heading) Velocity-space asymmetry of the trapping boundary of charged particles at and near the magnetic axis of a tokamak.
ΚΠ
1870 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 4) 602 A magnetic battery or magazine consists of a number of magnets joined together by their similar poles.
magnetic bottle n. a magnetic field that confines a plasma within it.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > type of field
magnetic mirror1884
airfield1890
magnetic bottle1957
1957 Sci. Amer. Aug. 80/2 Since no conceivable material will withstand the temperature of these [thermonuclear] reactions, the hope is to contain them in a ‘magnetic bottle’ that will take advantage of the plasma's response to electromagnetic forces.
1967 Science Year 341 No one yet knows how to confine a hot plasma in a ‘magnetic bottle’ long enough for the energy liberated by relatively infrequent thermonuclear reactions to overcome the inevitable loss from electromagnetic radiation and from plasma escaping from the bottle.
1992 Sci. News 22 Aug. 122/2 (caption) Particles that slowly leak out of this ‘magnetic bottle’ and collide with atoms near the solar surface may account for the gamma ray afterglow.
magnetic brake n. a friction brake that is actuated magnetically.
ΘΚΠ
society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > brake > types of
friction-brake1874
hydraulic brake1874
band-brake1889
magnetic brake1899
strap brake1902
solenoid brake1914
anti-lock1968
1899 Sci. Abstr.: Physics & Electr. Engin. 2 572 Using a magnetic brake, which acts upon the fly-wheel of the driving engine.
1922 R. Glazebrook Dict. Appl. Physics II. 323/1 In magnetic brakes..an electromagnet..is held just above the rail to which it is attracted upon excitation.
1980 J. H. Price Source Bk. Trams 11/1 Magnetic brake, spring-mounted brake shoes which cling to rails when magnetized electrically.
magnetic bubble n. a small mobile region of reverse magnetization in a thin layer of magnetic material, in which the magnetization is perpendicular to the sheet and predominantly in one direction.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > region of reverse magnetization
bubble1967
magnetic bubble1970
1970 Nature 10 Oct. 114/1 Magnetic bubbles, small stable regions of reverse magnetization in a highly anisotropic ferrimagnetic sheet, were described by Dr. F. C. Rossol.
1971 Sci. Amer. June 78/1 A promising alternative..exploits a new technology in which data bits are stored in the form of magnetic ‘bubbles’ moving in thin films of magnetic material... The bubbles are stable over a considerable range of conditions and can be moved from point to point at high velocity.
1980 GEC Jrnl. Sci. & Technol. 46 117/2 Magnetic bubble devices (MBDs)..have the big virtue that they require no electrical power to store information.
magnetic circuit n. a closed path described by magnetic flux.
ΚΠ
1853 C. V. Walker tr. A. de la Rive Treat. Electr. I. iii. iii. 292 This influence of the armature appears to be due to a state of equilibrium that is established between all the parts of what might be called a closed magnetic circuit, that is to say, of a horse-shoe magnet, the two extremities of which are connected with an armature.
1887 Rep. Brit. Assoc. Advancem. Sci. 1886 551 The hysteresial dissipation of energy per unit volume of iron is the same whether the magnetic circuit be open or closed.
1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) ix. 241 The corners of the apparatus have no practical influence except when the strength of the field is small, as is proved by the effect of the addition of corner-pieces to improve the magnetic circuit.
1993 Caves & Caving Winter 31/3 It is not a good idea to leave the drill unassembled for any length of time without inserting some form of ‘keeper’ to complete the magnetic circuit.
magnetic compass n. (a) a compass which indicates the direction of magnetic north, using the earth's magnetic field; = compass n.1 12; (b) Zoology the ability of some animals to sense the direction or alignment of the earth's magnetic field, for use in orientation; the supposed organ or structure that perceives this.
ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass
compass?1518
dial1523
shipman's card1530
nautical compass1552
mariner's compass1594
pyx1686
pyxis1686
box and needle1753
magnetic compass1838
1838 Biblical Repertory Apr. 168 There seems to be good reason for believing that they preceded Europe in what are justly considered three of the most important inventions or discoveries of modern times, the art of printing, the composition of gunpowder, and the magnetic compass.
1885 Rep. Brit. Assoc. Advancem. Sci. 627 The object of producing a gyrostatic model of the magnetic compass may..be much more simply attained by merely suspending the gyrostat by a very long fine wire.
1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) ix. 217 The magnetic compass has in many cases been abandoned in favour of one based on a quite different principle, the gyro-compass which depends on the turning force of a rapidly rotating body.
1969 Q. Rev. Biol. 44 260 Even a magnetic compass would not suffice to permit compensation for cross winds, or for some types of goal-directed homing.
1972 Science 7 Apr. 62/1 The magnetic compass of European robins does not use the polarity of the magnetic feild for detecting the north direction.
1990 Pilot Oct. 20/1 You have carefully aligned your gyro compass with the magnetic compass, allowing for any deviation error.
1996 Nature 18 Apr. 593/3 They have set out in their newest book—one of the slim, densely packed volumes in Springer's ‘zoophysiology’ series—to review magnetic compass orientation in animals.
magnetic course n. a course of navigation in relation to magnetic north.
ΚΠ
1804 A. Mackay Compl. Navigator iii. iii. 197 The true course is found by the common rules of navigation; and if the variation of the compass be known, the magnetic course may be obtained.
1872 W. C. Bergen Pract. Navigation & Naut. Astron. 235 At the place where the edge of the ruler cuts the curve, draw a line to represent the correct magnetic course.
1953 C. H. Cotter Elem. of Navigation xvi. 153 The magnetic course is the horizontal angle between the direction of magnetic north and the direction of the ship's head.
1994 J. Barth Once upon Time 389 I..then applied the necessary leap-year correction the wrong way, as nonprofessional navigators will sometimes miscorrect for variation between True and Magnetic courses when moving from chart to compass or vice versa.
magnetic declination n. = declination n. 8(b), variation n. 5a; (formerly also) †= declination n. 8(a) (obsolete).
ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > variation
north-easting1555
variation of the compass, (lodestone,) or needle?a1560
norwesting1561
north-westing1571
variation1595
declination1625
magnetic variation1696
variation of the variation1706
magnetic declination1787
1602 H. Briggs (title) A table to find the height of the Pole; the magnetical declination being given.]
1787 J. Lorimer Let. in T. Cavallo Treat. Magnetism App. 339 From 1657 at London, and 1666 at Paris, a west declination began, and has ever since increased, gradually though not uniformly, or in the direct proportion of the times; for such is the nature of the magnetic declination.
1814 P. Barlow New Math. & Philos. Dict. at Variation M. Burckardt, an ingenious French astronomer, invented a formula to represent the magnetic declinations observed at Paris.
1830 Philos. Trans. (Royal Soc.) 120 101 The disturbance of the magnetic declination by the northern lights on the evening of the 14th December [1829] was so great.., as to leave no shadow of doubt regarding the reality of the phenomenon.
1849 Trans. Royal Soc. Edinb. 19 ii. p. xviii The probable error of an observation of magnetic declination..is least in June.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) IV. 20/1 One of these [components], called variation by the navigator and magnetic declination by the magnetician, is the angle between magnetic and geographic meridians.
1997 Irish Times (Nexis) 5 June 2 A consequence of this meandering of the pole is that the magnetic declination, the angle between the ‘true’ north and ‘magnetic north’, is continually changing.
magnetic dip n. = dip n.1 4.
ΚΠ
1839 Rep. Brit. Assoc. Advancem. Sci. 1838 49 A series of determinations of the magnetic dip and intensity should be executed in various parts of the United Kingdom.
1968 G. M. B. Dobson Exploring Atmosphere (ed. 2) x. 183 The angle between the horizontal plane and the dipping magnet is known as the magnetic dip.
1994 Physics Abstr. A. 1 Oct. 12531/1 The extensive set of geomagnetic data at nine observatories in India covering the region of magnetic dip angle 0 degrees to 50 degrees N for the period of 1975 to 1986 has shown that the equinoctial maxima in the geomagnetic field are observed only on the horizontal and vertical components at the electrojet observatories.
magnetic domain n. Physics = domain n. 4h.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field
field1845
magnetic domain1953
1953 J. D. Kraus Electromagnetics v. 235 A number of crystal fragments are shown, each with a number of magnetic domains.
1990 P. Kearey & F. J. Vine Global Tectonics iii. 54 Viscous remanent magnetization (VRM) may arise when a rock remains in a relatively weak magnetic field over a long period of time as the magnetic domains relax and acquire the external field direction.
magnetic drum n. Computing a revolving cylinder having a magnetizable outer surface on which data is stored in the form of magnetized spots on circular tracks.
ΘΚΠ
society > computing and information technology > hardware > secondary storage > [noun] > magnetic > drum
memory drum1933
magnetic drum1946
drum1948
drum memory1952
1946 C. B. Sheppard in Moore School Lect. (1985) 252 The relative access times..are based on having approximately 30,000 pulses along the scanned dimension except for the cases of the magnetic drum which is based on 1,000 pulses.
1950 W. W. Stifler High-speed Computing Devices (Engin. Res. Associates) xiv. 304 A rotating magnetic drum..is a static storage system..because data recorded on the drum are static with respect to the surface of the drum.
1955 Sci. Amer. June 98/2 For the larger, intermediate-speed memory of a computer the favorite device at present is the magnetic drum.
1986 S. L. Mandell Working with Applic. Software ii. 32 Data stored on magnetic disks or magnetic drums does not have to be read in order from the beginning.
magnetic epoch n. Geology = polarity epoch n. at polarity n. Compounds 1.
ΚΠ
1963 Nature 15 June 1050/2 Magnetic epochs of unequal length are also consistent with these results.
1981 Bull. Geol. Soc. Amer. 92 107/1 We have used the carbonate record of piston core RC12-66 to describe Gilbert Magnetic Epoch carbonate events.
magnetic field n. a field (field n.1 15a) of the kind that is produced by a magnetic body (also by an electric current and a varying electric field) and acts on magnetic material.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > field
magnetic field1845
1845 M. Faraday Diary 10 Nov. (1933) IV. 331 Wrought with bodies between the great poles, i.e. in the magnetic field, as to their motions under the influence of magnetic force.
1906 A. Russell Treat. Theory Alternating Currents II. 191 Hutin and Leblanc provided the field magnets with ‘amortisseurs’, or ‘dampers’, which tend to prevent any relative change between the positions of the magnetic field due to the armature and the field due to the field magnets.
1940 M. Tornich Radius Action Aircraft 122 A magnetic compass is composed of magnetic needles which align themselves with the earth's magnetic field.
1953 S. W. Amos & D. C. Birkinshaw Television Engin. I. 250 In general there are two types of magnetic lenses, one employing a long magnetic field..and the other using a short magnetic field.
1996 Guardian 10 Sept. i. 9 (caption) The survey team criss-cross the site using a fluxgate gradiometer, a device highly sensitive to magnetic fields.
magnetic field strength n. Physics the strength of a magnetic field at a given point, usually expressed as a vector quantity (symbol H) whose magnitude is the ratio of the magnetic flux density to the permeability of the medium at that point.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > field > intensity of
field strength1885
magnetic field strength1931
1931 S. W. Williams Magn. Phenomena i. 20 (heading) Magnetic Field strength along the axis of a circular current.
1976 B. I. Bleaney & B. Bleaney Electr. & Magn. (ed. 3) iv. 109 The vector H is called the ‘magnetic field strength’... The dimensions of H are different from those of magnetic flux density B; it is important to remember this distinction, because magnetic flux density is often loosely referred to as ‘the field B’.
1991 New Scientist 6 July 27/1 The magnetic bundles, known as magnetic flux quanta, are the smallest possible amount of magnetic energy which can exist in a superconductor, and their size is related to the magnetic field strength.
magnetic flux n. Physics (the number of) lines of magnetic induction passing through an area; the integral over the area of the component of the induction normal to the area; cf. flux n. 9b.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > magnetic flux
flux1873
magnetic flux1896
1896 F. Bedell Princ. Transformer i. 3 The primary electromotive force..is equal to the product of the number of primary turns, and the rate at which the magnetic flux in the magnetic circuit is changing.
1978 H. M. Rosenberg Solid State (ed. 2) xiv. 255 Consider a superconducting ring..which has some magnetic flux trapped inside it.
1996 Nature 15 Aug. 588/3 Much of the magnetic flux on the Sun is in a tangled, turbulent state, with mixed polarities within each spatial resolution element.
magnetic induction n. (a) the production of magnetism in a body when it is placed in a magnetic field; (b) = induction n. 10b.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > electromagnetic induction > [noun]
excitation1656
induction1801
magnetic induction1851
unipolar induction1856
influence1870
magneto-induction1889
unipole1892
1851 W. Thomson in London, Edinb., & Dublin Philos. Mag. 4th Ser. 1 178 It is..desirable that a complete theory of magnetic induction in crystalline or non-crystalline matter should be established independently of any hypothesis of magnetic fluids.
1855 J. C. Maxwell in Trans. Cambr. Philos. Soc. (1864) 10 49 The length of a cell is therefore inversely as the intensity of the magnetizing force, and its section is inversely as the quantity of magnetic induction at that point.
1866 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 2) viii. i. 529 This action, in virtue of which a magnet can develop magnetism in iron, is called magnetic induction or influence.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VII. 71/2 The magnetic induction may..be expressed in terms of the force F on a current element of length l and current I.
1991 Food & Wine Aug. 27/2 Designed with a flat bottom, this wok..works on any stove, including magnetic induction cooktops.
magnetic ink n. ink containing particles of magnetic material.
ΘΚΠ
society > communication > writing > writing materials > ink > [noun]
inkc1250
arnementc1300
writing ink1548
magnetic ink1953
1953 Math. Tables & Other Aids Computation 7 204 After the data are recorded on a magnetized surface, the latest magnet image is developed with a magnetic ink and transferred to paper and fixed.
1975 G. Bram & C. Downs Manuf. Technol. ii. 68 ‘Magnetic inks’, which are usually fine magnetic-oxide powder suspended in a liquid vehicle, are applied to the component surface.
1998 Investor's Business Daily (Nexis) 11 Dec. a1 The computer coding at the bottom of your checks is printed with magnetic ink.
magnetic ink character recognition n. automatic reading (using a magnetic device) of characters printed in magnetic ink; abbreviated MICR.
ΚΠ
1956 Magnetic Ink Char. Recognition (Amer. Bankers Assoc.) 7 The Bank Management Commission of the American Bankers Association on July 21, 1956 approved a recommendation for the adoption of magnetic ink character recognition as the common machine language most suitable for check handling.
1979 J. E. Rowley Mechanised In-house Information Syst. i. 59 Magnetic ink character recognition (MICR) is a means of deciphering characters printed in an ink containing magnetisable material.
1999 Bank Technol. News (Nexis) Jan. In a typical POS check conversion, a consumer presents a check to pay for goods at a retail check out, where it is scanned through a magnetic ink character recognition (MICR) reader and the pertinent bank and account information is captured for creating an ACH debit.
magnetic lens n. (a device producing) a magnetic field capable of focusing a beam of charged particles.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > type of field > device producing
magnetic lens1919
1919 London, Edinb., & Dublin Philos. Mag. 6th Ser. 38 709 Such a ‘magnetic lens’ is not of much immediate value as the magnetic spectrum of positive rays is very complex.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) VIII. 33/2 Magnetic lenses are employed as condensers, objectives, and projection lenses in magnetic electron microscopes, as final focusing lenses in the electron guns of cathode-ray tubes, and for the selection of groups of charged particles of specific velocity in velocity spectrographs.
1984 E. P. DeGarmo et al. Materials & Processes in Manuf. (ed. 6) xxvi. 717 Magnetic lenses are used to focus the beam and deflection coils control the position of the beam.
magnetic levitation n. Physics levitation by magnetic forces; frequently attributive, with reference to transport systems in which vehicles are suspended above a track in this way.
ΘΚΠ
society > travel > transport > transport by psychic or futuristic means > [noun]
teleportation1931
transporter1940
teleporting1946
teletransportation1946
teleportage1951
magnetic levitation1966
maglev1973
1966 Physics Lett. 23 609 (title) Preliminary results in the search for fractionally charged particles by the magnetic levitation electrometer.
1976 J. Lukasiewicz Railway Game xxiii. 231 Advanced transportation concepts, such as application of magnetic levitation to surface transportation.., are being funded in preference to work on more conventional systems, such as wheel-on-rail.
1992 L. Niven & S. Barnes Calif. Voodoo Game ix. 94 The train shivered slightly, but magnetic levitation didn't fail.
ΚΠ
1870 E. Atkinson tr. A. Ganot Elem. Treat. Physics (ed. 4) 602 A magnetic battery or magazine consists of a number of magnets joined together by their similar poles.
magnetic memory n. (a) a dependence of the magnetic state of a body on its previous magnetic history; (b) Computing a memory that employs the magnetic properties of its components.
ΘΚΠ
society > computing and information technology > hardware > secondary storage > [noun] > magnetic
magnetic memory1887
bubble memory1969
1887 Jrnl. Soc. Telegraph-engineers & Electricians 16 523 No matter how treated, a piece of soft iron has a ‘magnetic memory’.
1947 L. B. Loeb Fund. Electr. & Magn. (ed. 3) xvii. 242 A continuous curve is retraced that never restores the magnetic material back to its zero value. This behavior can be ascribed to a sort of ‘magnetic memory’ of the substance.
1957 Economist 30 Nov. 797 The electronic valves, transistors and magnetic memories used in the modern computer have been developed from knowledge gained from other spheres of electronic applications.
1970 O. Dopping Computers & Data Processing x. 138 Another static magnetic memory is the laminated ferrite memory which consists of a laminate of a number of thin sheets.
magnetic meridian n. the great circle which passes through a given point on the earth's surface and through the two magnetic poles.
ΘΚΠ
the world > the earth > geodetic references > [noun] > meridian > magnetic
magnetic meridian1740
1667 Philos. Trans. (Royal Soc.) 2 479 He can infuse such vertue into a piece of Steel, that it shall..give also to a Needle, the vertue of conforming to the Magnetical Meridian, without the help of a Load-Stone.]
1740 Philos. Trans. 1737–8 (Royal Soc.) 40 386 That End will attract the South End of the Needle, when the Bar is held horizontal, and at Right Angles to the Magnetic Meridian.
1837 D. Brewster Treat. Magnetism 11 He..made numerous experiments with bars of iron and steel placed in the magnetic meridian.
1925 H. C. Booth tr. F. Auerbach Mod. Magnetics (U.K. ed.) ii. 23 This position is best defined by the angle which the needle makes with the direction of the magnetic meridian, the direction that is of the lines of force due to the earth.
1935 C. J. Smith Intermediate Physics (ed. 2) xl. 669 When a small compass needle is placed in a horizontal plane and is free to rotate about a vertical axis passing through its centre it comes to rest in the magnetic meridian.
magnetic mine n. a submarine mine that is detonated by the approach of a magnetized body such as a ship.
ΘΚΠ
society > armed hostility > hostilities at sea > naval weapons and equipment > [noun] > mine
undermine1682
American turtle1775
torpedo1776
submarine1846
mine1862
pole torpedo1877
ground-torpedo1878
spar torpedo1878
countermine1880
acoustic mine1923
magnetic mine1939
limpet1942
pressure mine1943
oyster1945
1939 News Rev. 30 Nov. 13/1 We already know the secrets of the magnetic mine.
1974 Encycl. Brit. Micropædia VI. 910/2 Three common types of naval mine are in use, classed by their method of detonation: magnetic mines, pressure mines, and acoustic mines.
1989 Ships Monthly Mar. 23/3 With the advent of the magnetic mine..the Admiralty required large numbers of fishermen to man the deep-sea fishing vessels being converted to minesweepers.
magnetic mirror n. (a) a magnetized surface that reflects light; (b) a magnetic field that reflects charged particles.
ΘΚΠ
the world > physical sensation > sight and vision > optical instruments > mirror > [noun] > other mirrors
perspective glass1570
side mirror1769
index-glass1773
Claude Lorraine glass1792
anamorphoscopea1884
magnetic mirror1884
ox-eye1890
busybody1892
rear mirror1896
triple mirror1907
three-way mirror1964
two-way mirror1967
the world > matter > physics > electromagnetic radiation > magnetism > [noun] > magnetic field > type of field
magnetic mirror1884
airfield1890
magnetic bottle1957
1884 P. B. Randolph (title) Seership! The magnetic mirror. A practical guide to those who aspire to clairvoyance.
1894 Jrnl. Inst. Electr. Engineers 23 448 (heading) Researches on the reflection of polarised light from magnetic mirrors.
1952 Classified Conf. Thermonucl. Reactors held at Denver June 28, 1952 (AEC Rept. Wash.–115) 83 A second possible attack on the problem of containment of a linear discharge at its ends is through the use of what might be called an ‘enhanced magnetic mirror’. The ordinary ‘magnetic mirror’ effect has been known for some time.
1956 L. Spitzer Physics of fully Ionized Gases i. 11 The constancy of the magnetic moment has the immediate result that gyrating particles will tend to be reflected from regions of increasing magnetic field... Such a reflecting region may be called a ‘magnetic mirror’.
1980 W. M. Gibson Physics Nucl. Reactors x. 200 At the Culham laboratory..magnetic mirror and bottle systems have received thorough investigation.
magnetic moment n. Physics the property of an object or particle by virtue of which it experiences a torque in an applied magnetic field; spec. the ratio of the maximum torque experienced by a magnetic dipole in a magnetic field to the strength of the field.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > electricity > electrically induced magnetism > [noun] > field > dipole moment
magnetic moment1865
(magnetic, electric) dipole moment)1962
the world > matter > physics > electromagnetic radiation > magnetism > magnetic devices or materials > [noun] > pole of magnet > distance between poles
magnetic moment1865
moment1865
1865 London, Edinb., & Dublin Philos. Mag. 4th Ser. 29 441 The product of the strength of the poles into the length between them is called the magnetic moment of the magnet.
1884 F. Krohn tr. G. Glaser de Cew Magneto- & Dynamo-electr. Machines 272 The other ponderomotive force which the rotating helix experiences from its magnetic iron core..further depends upon the magnetic moment of the iron core.
1981 P. Sykes Guidebk. to Mechanism in Org. Chem. (ed. 5) xi. 299 Electron spin resonance (e.s.r.) spectroscopy, which utilises the permanent magnetic moment conferred on a radical by virtue of the spin of its unpaired electron.
magnetic money n. a prepaid card, magnetically encoded with units of credit which are erased in an electronic terminal as purchases are made.
ΚΠ
1970 New Scientist 22 Oct. 173/1 These ‘magnetic money’ cards have all the convenience of the currency of the future.
1990 Time 8 Jan. 33/2 Regulation of magnetic-money sales may also help authorities keep better tabs on cash-intensive industries.
magnetic monopole n. Physics a hypothetical massive particle which is a single magnetic pole with a spherically symmetric field, the existence of which is predicted by quantum field theory.
ΘΚΠ
the world > matter > physics > quantum theory > quantum mechanics > quantum electrodynamics > [noun] > single charge or pole
unipole1931
magnetic monopole1951
monopole1951
1951 Proc. Cambr. Philos. Soc. 47 196 Dirac has suggested that the quantization of electric charge could be explained by the existence of magnetic monopoles.
1975 Physical Rev. Lett. 35 489/2 We conclude that we have detected a magnetic monopole of strength g = 137e.
1991 C. A. Ronan Nat. Hist. Universe 28/3 Single magnetic poles..should survive today, and should be as massive as the X particle. However, experiments to find magnetic monopoles have so far been inconclusive.
magnetic needle n. a piece of magnetized steel used as an indicator of direction, esp. as part of a compass; cf. needle n. 2a.
ΘΚΠ
society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > needle of
needle1555
fly?a1560
versor1640
magnetic needle1674
1581 W. Borough (title) A discours of the variation of the cumpas, or magneticall needle.]
1674 R. Boyle Excellency Theol. ii. v. 215 The magnetick needle not onely declining in many places from the true points of N. and S. but..varying in tract of time its declination in the self-same place.
1794 S. Williams Nat. & Civil Hist. Vermont 378 The magnetic needle can never give to the surveyor a straight and accurate line.
1889 G. M. Hopkins Exper. Sci. xvi. 348 By placing a bar of hardened steel in the magnetic meridian and striking it several blows on the end with a hammer, it becomes permanently magnetic, not strongly, but sufficiently to exhibit polarity when presented to a magnetic needle.
1940 M. Tornich Radius Action Aircraft 122 A magnetic compass is composed of magnetic needles which align themselves with the earth's magnetic field.
1993 Climber & Hillwalker Nov. (Winter Skills Suppl.) 23/2 If it is not located on this continuation, return to the point when you estimated your distance was up (to go on a back bearing simply turn so the magnetic needle points to south on the housing).
magnetic north n. the north magnetic pole; the direction of this.
ΘΚΠ
the world > the earth > geodetic references > [noun] > pole > magnetic
south pole1553
magnetic (also magnetical) pole1581
magnetic north1812
palaeopole1962
1812 R. Woodhouse Elem. Treat. Astron. xli. 409 The Magnetic North, almost always, differs from the true.
1873 J. C. Maxwell Treat. Electr. & Magn. (1881) II. 19 In speaking of a line of magnetic force we shall always suppose it to be traced from magnetic south to magnetic north.
1959 Times 7 May 11/4 Archaeomagnetism is based on the principle that many clays and stones, if heated beyond a certain point..tend to get a fixed magnetism in the direction of the earth's magnetic north at the time they cooled after firing.
1990 Canoe Aug. 64/3 Compasses point to magnetic north, not true north. If you live far east or west of the agonic..line, you must adjust for declination.
magnetic particle inspection n. Engineering a method of testing ferrous metal parts for defects by examining the magnetized metal for irregularities in its magnetic field, which become outlined when fine magnetic particles are applied to the metal.
ΚΠ
1947 Trans. Amer. Foundrymen's Soc. 55 488/1 A large magnetic particle inspection unit was built to perform all operations except the visual examination automatically.
1986 Jrnl. Physics D 19 657 Magnetic particle inspection (MPI) has been extensively employed for the non-destructive testing of ferrous metals for the past fifty years.
1996 Mod. Tire Dealer (Nexis) Feb. You can also have suspect steel wheels checked at a local machine shop with magnetic particle inspection station.
magnetic particle testing n. = magnetic particle inspection n.
ΚΠ
1967 C. E. Betz (title) Principles of magnetic particle testing.
1984 E. P. DeGarmo et al. Materials & Processes in Manuf. (ed. 6) xvi. 469 Magnetic particle testing is a method for locating surface and subsurface discontinuities in ferromagnetic materials.
magnetic permeability n. see permeability n. 1b.
magnetic pole n. see pole n.2 6b.
magnetic pyrites n. [after German Magnetischer-Kies (attributed to A. G. Werner by C. A. S. Hoffmann 1789, in Bergmännisches Jrnl. 1 383)] = pyrrhotite n.
ΘΚΠ
the world > the earth > minerals > types of mineral > sulphides and related minerals > [noun] > sphalenite group > copper iron sulphide
pyrites1567
yellow ore1630
podar1778
magnetic pyrites1809
bornite1811
towanite1852
peacock copper1858
peacock ore1858
homichlin1859
horseflesh ore1868
talnakhite1969
1809 Trans. Amer. Philos. Soc. 6 ii. 322 This quartz is sterile in metallic substances; some signs of oxidulated iron only and of magnetic pyrites are found in it.
1843 J. E. Portlock Rep. Geol. Londonderry 225 Magnetic pyrites occurs in considerable quantity in a greenstone dike.
1883 Science 1 464/2 Meteorite fragments are composed of nickeliferous iron, magnetic pyrites, taenite, and silicates.
1987 R. L. Bates & J. A. Jackson Gloss. Geol. (ed. 3) 397/2 Magnetic pyrites, pyrrhotite.
magnetic quantum number n. the quantum number m (see M n. 11b).
ΘΚΠ
the world > matter > physics > quantum theory > [noun] > quantum number
quantum number1902
quantum defect1915
principal quantum number1922
magnetic quantum number1923
1923 Jrnl. Optical Soc. Amer. 7 415 The numbers at the left show the magnetic quantum number m characterizing each level.
1961 J. L. Powell & B. Crasemann Quantum Mech. x. 355 Since the single electron in these atoms has zero angular momentum in the ground state, the magnetic quantum number must be m = 0.
magnetic resonance accelerator n. = cyclotron n.
ΘΚΠ
the world > matter > physics > atomic physics > particle physics > particle accelerator > [noun] > types of > cyclotron
cyclotron1935
magnetic resonance accelerator1935
alphatron1942
1935 E. O. Lawrence et al. in Physical Rev. 48 495/2 The term ‘magnetic resonance accelerator’ is suggested... The word ‘cyclotron’..has come to be used as a sort of laboratory slang for the magnetic device.
1968 F. Kertesz Lang. Nucl. Sci. (Oak Ridge Nat. Lab. TM 2367) 17 A number of the accelerators..have names ending in ‘…tron’, recalling the generic term cyclotron or magnetic resonance accelerator.
magnetic resonance imaging n. Medicine a technique using the phenomenon of nuclear magnetic resonance (especially of protons) to produce tomographic or three-dimensional images of the body, esp. of the soft tissues; cf. initialism MRI.
ΘΚΠ
the world > health and disease > healing > diagnosis or prognosis > radiography or radiology > scanning > [noun] > magnetic resonance imaging
magnetic resonance imaging1977
MRI1983
functional magnetic resonance imaging1988
fMRI1993
1977 Jrnl. Magn. Resonance 28 133 (heading) 19F magnetic resonance imaging.
1989 Brit. Med. Jrnl. 22 July 215/2 Measurement of the volume of the prostate by magnetic resonance imaging showed a 28% reduction.
1992 N.Y. Times Mag. 18 Oct. 50/3 In the $9.5 million brain-imaging center located in the basement of the hospital, the Iowa team has already pushed magnetic resonance imaging to its limit.
magnetic Reynolds number n. Physics a dimensionless number, analogous to the Reynolds number, used in magnetohydrodynamics to indicate whether the dynamic behaviour of a magnetized plasma is dominated by diffusion or by advection.
ΘΚΠ
the world > matter > physics > mechanics > fluid mechanics > [noun] > specific numbers or quantities
Reynolds number1910
Weber number1937
magnetic Reynolds number1950
Rayleigh number1950
1950 W. M. Elsasser in Rev. Mod. Physics 22 30/2 We might define a ‘magnetic’ Reynolds number as Rm = 4πμσLv,..where as usual L is a representative length and v is a representative velocity.
1974 Encycl. Brit. Macropædia XIV. 507/2 When the magnetic Reynolds number is much greater than one, resistance effects can be ignored and the magnetic lines of force are said to be frozen to (or to move with) the plasma.
1995 Sci. Amer. Jan. 13/3 The field lines are trapped in the fluid, to an extent measured by the magnetic Reynolds number.
magnetic storm n. [after German magnetische Gewitter (A. von Humboldt 1830, in Ann. der Physik 19 358)] = geomagnetic storm n. at geomagnetic adj. Compounds; (also) a solar flare.
ΘΚΠ
the world > matter > physics > electromagnetic radiation > magnetism > earth magnetism > [noun] > disturbance
magnetic storm1836
1836 D. Brewster tr. A. von Humboldt in London & Edinb. Philos. Mag. 9 44 These vagaries of the needle..appeared to me the effect of a reaction of the interior of the earth towards the surface; I should venture to say, of magnetic storms, which indicate a rapid change of tension.
1859 Atlantic Monthly Dec. 745/1 The effects of this magnetic storm were apparent upon the wires during a considerable portion of Saturday evening.
1883 A. Domett Ranolf & Amohia (rev. ed.) I. i. vi. 107 Those dumb magnetic storms—Auroras lovelier than our sanguine dreams.
1931 H. S. Williams Bk. Marvels 51 There may be a connection between the appearance of sun-spots and the phenomenon known as a ‘magnetic storm’ on the earth.
1973 H. Carruth Coll. Poems (1992) 96 The silent magnetic storm that destroys the stars and flickers around our heads.
1991 C. A. Ronan Nat. Hist. Universe 196/3 Solar magnetic storms upset the ionosphere and so cause radio fade-outs.
magnetic stripe n. a narrow strip of magnetic material along the edge of cine film, on which sound may be recorded; (also) any similar strip on which data is stored.
ΘΚΠ
society > leisure > the arts > performance arts > cinematography > filming > filming equipment > [noun] > film > sound stripe
film recording1907
magnetic stripe1954
stripe1954
sound stripe1965
1954 R. H. Cricks tr. N. Bau How to make 8mm. Films 169 The magnetic stripe is coated between the perforations and the edge of the film.
1973 Sci. Amer. Dec. 49/1 Sights and sounds the camera records stay together on the super 8 film in synch during processing. Spoken comment can be added to the magnetic stripe during projection.
1991 Professional Engin. July 42/2 The smart card would be a direct substitute for the widely used magnetic stripe credit/charge card.
magnetic susceptibility n. the capacity of a substance for being magnetized by an externally applied magnetic field, measured as the ratio of the induced magnetization to the external magnetic field strength.
ΚΠ
1837 Rep. Brit. Assoc. Advancem. Sci. 1836 29 The extreme susceptibility of soft iron for the magnetic condition..was exhibited.]
1880 Philos. Trans. (Royal Soc.) 170 67 The magnetic susceptibility of the wire in the direction of its length must be unaltered.
1902 Encycl. Brit. XXX. 430/2 The magnetic susceptibility of a vacuum..is 0, that of a diamagnetic substance..has a negative value, while the susceptibility of paramagnetic and ferromagnetic substances..is positive.
1997 Oxoniensia 61 167 Volume magnetic susceptibility readings were taken throughout the sample profile at 1 cm. intervals using a Bartington MS2 magnetic susceptibility meter.
magnetic tape n. tape (now usually of coated plastic) having magnetic properties which enable it to be used for recording audio or video material or for storing data.
ΘΚΠ
society > communication > record > recording or reproducing sound or visual material > [noun] > tape
steel tape1900
tape1932
magnetic tape1937
audiotape1957
leader tape1960
mag tape1960
digital audio tape1978
DAT1982
DCC1990
1937 Bell Syst. Techn. Jrnl. 16 165 (heading) Sound recording on magnetic tape.
1942 Jrnl. Royal Aeronaut. Soc. 46 68 This paper described an electro-magnetic method of producing and controlling reverberation by the use of a magnetic tape recording system. It consists of recording a sound pattern magnetically on steel tape.
1957 Economist 30 Nov. 807/2 The computer, in turn, produces the instructions on magnetic tape which is read by the control apparatus of the cutting machine.
1958 Listener 16 Oct. 605/1 Stereophonic magnetic tape recordings have been available for some time.
1993 What Hi-Fi? Oct. 108/4 Drop Out happens during tape recording or playback when the magnetic tape coating briefly loses contact with the head.
magnetic termite n. an Australian termite, Amitermes meridionalis (family Termitidae), which builds mounds aligned north–south.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > subclass Pterygota > [noun] > division Exopterygota or Hemimetabola > order Isoptera > member(s) of (termites)
white ant1625
wood-ant1709
termes1773
termite1781
termite ant1815
duck-ant1851
magnetic termite1935
mudguts1952
1935 K. C. McKeown Insects Wonders Austral. xvii. 140 The magnetic termite..builds an amazing nest like a brick wall.
1965 Austral. Encycl. VIII. 464 In the nests of the magnetic termite..food..is stored in some or most of the galleries and chambers of the mound.
1996 Straits Times (Singapore) (Nexis) 10 Mar. (caption) Bathers swim in a placid rock pool below a waterfall in Litchfield Park and magnetic termite mounds on the road to Litchfield that resemble gravestones.
magnetic wire n. now historical wire made of magnetizable metal (sometimes with a non-magnetic core) and used as a recording medium, esp. for audio and data storage.
ΚΠ
1946 J. W. Mauchly in Moore School Lect. (1985) 106 The external memory for an EDUAC is to consist of a magnetic wire or magnetic tape.
1990 Gramophone May 2098/3 In conjunction with his friend David Dryden he designed and produced a magnetic wire recorder some years before such machines were available in the UK.
1996 F. Chappell Farewell I'm bound to leave You (1997) 206 He had heard or recorded on paper or wax cylinder or magnetic wire or simply in his memory..the songs of coal miners, flatboat men, railroad firemen.
magnetic zenith n. the point of the sky directly above the magnetic pole of the earth, esp. as the focal point of an aurora.
ΘΚΠ
the world > the universe > celestial sphere > [noun] > zenith > magnetic
magnetic zenith1837
1837 Ann. Rep. Regents Univ. State N.Y. 165 The ‘merry dancers’ were seen faintly flashing up from the horizon to the magnetic zenith.
1885 S. Tromholt Aurora Borealis I. x. 221 The Auroral Corona..is produced by the streamers shooting from every part of the sky towards a common point, viz., the magnetic zenith.
1950 Science 17 Nov. 590/1 A spectrum of an auroral arc in the magnetic zenith..showed that the H-alpha emission line is strongly asymmetric to the violet.
2014 Jrnl. Atmospheric & Solar-Terrestr. Physics 107 9/1 The cameras were directed towards the magnetic zenith.
This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022).
<
adj.n.1611