injectionn.
/ɪnˈdʒɛkʃən/ 1. The action of injecting; casting or throwing in.† a. In general sense. Obsolete. rare.
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the world > movement > motion in a certain direction > going or coming in > [noun] > casting or throwing in
incasting1469
injection1611
the world > space > place > placing or fact of being placed in (a) position > insertion or putting in > [noun] > forcible
thrustingc1380
incasting1469
injection1611
intrusion1639
obtrusion1847
in-pushing1884
1611 R. Cotgrave Dict. French & Eng. Tongues Injection, an injection; a casting in, or vpon.
1626 F. Bacon Sylua Syluarum §327 I wish also, that there be, at some times, an Iniection of some Oyled Substance.
1686 J. Goad Astro-meteorologica ii. xiv. 341 'Tis a great Stone which upon injection mudds the Water.
b. spec. The action of forcing a fluid, etc. into a passage or cavity, as by means of a syringe, or by some impulsive force; esp. the introduction in this way of a liquid or other substance into the vessels or cavities of the body, either for medicinal purposes, or (in a dead body or portion of one) in order to exhibit the structure or preserve the tissues. Also relating to internal-combustion engines: see fuel injection n. at fuel n. Compounds 2.
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the world > movement > motion in a certain direction > going or coming in > [noun] > forcing fluid in
injection?1541
the world > health and disease > healing > medical treatment > hypodermic treatments > [noun] > injection or syringing
injection?1541
infusion1601
injecting1611
syringing1658
lavement1794
society > occupation and work > equipment > machine > machines which impart power > engine > internal-combustion engine > [noun] > parts of > fuel injector > injection of fluid
injection1842
fuel injection1900
priming1911
direct injection1935
petrol injection1940
?1541 R. Copland Galen's Fourth Bk. Terapeutyke sig. Hiij, in Guy de Chauliac's Questyonary Cyrurgyens It is also many tymes necessary to make iniection of the medycamentes in the bladder by the yerde.
1625 J. Hart Anat. Urines ii. iv. 69 After the iniection of an anodine, or mitigating glister, the paine was much eased.
1668 T. Clarek (title) Observations on the Origin of the Injection into Veins, the Transfusion of Blood [etc.].
1728 E. Chambers Cycl. Injection,..is likewise a common Term for filling the Vessels with coloured Wax, or any other proper Matter, to shew their Figures and Ramifications.
1799 Med. & Physical Jrnl. 2 441 The frequent injection of clysters is generally insisted on.
1842 Penny Cycl. XXII. 507/2 The most effectual method of condensation is by the injection of cold water into the condenser.
1845 C. Darwin Jrnl. (ed. 2) xiv. 312 This rending and injection would, if repeated often enough..form a chain of hills.
1894 B. Donkin tr. R. Diesel Theory & Constr. Rational Heat Motor ii. 60 The injection of the combustible powder-dust coal takes place gradually and continuously, during part of the stroke of the piston.
1921 W. H. Berry Mod. Motor Car Pract. i. 32 Mechanical injection would permit of greater power development.
1933 A. W. Judge High Speed Diesel Engines iii. 25 Advancing..the moment of injection is equivalent to..advancing the ignition in petrol engines.
1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) V. 556/1 In a diesel engine, a fuel pump starts injection at the proper engine crank angle and meters the required quantity of fuel through the nozzle.
c. transferred in scientific contexts (see inject v. 1c).
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the world > matter > physics > solid state physics > semiconductivity > [noun] > carrier of charges > introduction of
injection1945
injector1945
the world > matter > physics > electromagnetic radiation > electricity > circuit > [noun] > alternating circuit > act of feeding in current
injection1945
the world > matter > physics > atomic physics > particle physics > particle accelerator > [noun] > introduction of particles
injection1971
1945 Jrnl. Appl. Physics 16 593/2 The electron injection and orbit shift circuits were instantaneous in their action.
1949 Ryder & Shockley in Physical Rev. 75 310/1 Pronounced lowering of resistance can result from transistor action, i.e. the injection of holes into the N-type material from a metal contact.
1949 W. Shockley et al. in Bell Syst. Techn. Jrnl. XXVIII. 345 We shall discuss..evidence that holes are actually introduced into n-type germanium by the forward current of an emitter point... We shall refer to this important process as ‘hole injection’.
1950 D. Halliday Introd. Nucl. Physics ix. 360 Injection may be done by taking advantage of the necessary radial stability of the betatron orbit.
1952 Adv. Electronics IV. 225 A method for the phase control of microwave tubes..utilizes the injection of power via the output circuit of the oscillator to be controlled.
1958 W. Ehrenberg Electr. Conduction Semiconductors & Metals xii. 322 The injection of minority carriers is the basic effect in junction rectifiers and transistors.
1962 Proc. IRE 50 1781/1 Under double injection, that is, the simultaneous injection into the insulator of electrons from a cathode and holes from an anode, space-charge limitations are..partially overcome.
1971 Nature 9 July 77/1 Cyclotrons have an inherent advantage over tandem Van de Graaffs—there is no need to produce a negative ion for injection.
1971 Physics Bull. Aug. 461/1 Such [acoustic] waves are obtained either by deliberate injection from a transducer or by amplifying some of the thermally generated waves already present.
d. Astronautics. The placing of a spacecraft in, or its entry into, a particular orbit or trajectory; the time when this occurs; frequently attributive, as injection point n. the point at which a spacecraft enters a new orbit or trajectory.
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society > travel > air or space travel > space flight > [noun] > a space shot or flight > course or trajectory of spacecraft > entry into specific trajectory or orbit
injection1959
insertion1962
society > travel > air or space travel > space flight > [noun] > a space shot or flight > course or trajectory of spacecraft > entry into specific trajectory or orbit > point of
injection point1959
insertion point1962
1959 IRE Trans. Mil. Electronics 3 150/1 We will assume the vehicle's orbit consists of three phases..: first, escape hyperbola..; second, the sun-centered ellipse controlled only by sun's gravity and using injection conditions taken from the escape hyperbola leaving earth; and third,..the approach hyperbola.
1959 IRE Trans. Mil. Electronics 3 151/1 The properties of the trajectory after injection.
1960 IRE Trans. Military Electronics 4 152/1 In order to have zero relative inclination, the injection point must be exactly in the plane of the moon's orbit.
1961 C. T. Morrow Symposium Ballistic Missile & Aerospace Technol. I. 208 An initial powered flight phase leads to injection of the vehicle into a coast trajectory.
1963 S. Lees Air, Space, & Instruments 100 For each..location there is a readily computable impulsive velocity change (termed the ‘injection velocity’)..which will place the vehicle in a hyperbolic path with the desired terminal velocity.
1963 S. Lees Air, Space, & Instruments 100 Geographical restrictions tend to limit the choice of injection points.
1966 E. Burgess Assault on Moon iii. 73 A 1 mile error in position at injection can cause a miss of 650 miles.
e. figurative.
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society > trade and finance > financial dealings > types of money-dealing > [noun] > provision of capital
financing1865
bankrolling1935
injection1968
venture capitalism1969
1968 Listener 7 Nov. 601/1 Colonel Ojukwu has had sizable injections of capital from European sympathisers.
1970 Daily Tel. 7 Oct. 7 An immediate financial injection into the hard-pressed agricultural industry, worth..£54 million, is to be made by the Government.
1972 Guardian 22 July 1/8 The report will ask for a massive injection of Government money into the docks industry.
2. Pathology. The fact of being charged with injected matter; injected or blood-shot condition.
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the world > health and disease > ill health > a disease > disorders of internal organs > [noun] > other disorders
oppletion1615
lesion1640
reflux1662
stress1682
prosphysis1684
injection1806
collapse1808
exstrophy1835
extroversion1835
fatigue1872
splanchnomegaly1910
malalignment1922
arrest1939
1806 Med. & Physical Jrnl. 15 469 The injection of the cellular membrane with blood.
1886 New Sydenham Soc. Lexicon Injection,..In Pathology, the condition or state of distension of the capillaries with blood.
1887 A. H. Buck Ref. Handbk. Med. Sci. IV. 660 Massage is contra-indicated when it is found to cause excessive injection, and especially if there be photophobia and lachrymation; and it must not be employed in the presence of iritis.
3. concrete. That which is injected; spec. a liquid or solution injected into an animal body, for medicinal purposes, as an enema, or for preserving the tissues, or displaying the structure by colouring or inflation.
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the world > health and disease > healing > medical treatment > hypodermic treatments > [noun] > injection or syringing > that which is injected
injection1607
1607 E. Grimeston tr. S. Goulart Admirable & Memorable Hist. 93 Then they might see come forth with the said Injection little gobbets of bloud.
1616 J. Bullokar Eng. Expositor Iniection, a liquor which Surgeons doe squirt into a deepe wound.
1721 W. Gibson Farriers Dispensatory iii. x. 247.
1830 R. Knox tr. P. A. Béclard Elements Gen. Anat. 180 The red injection, which is fine and very penetrating, easily passes from the arteries into the veins, through the intermediate capillary system.
1897 T. C. Allbutt et al. Syst. Med. III. 741 The best of all injections for the relief of tympanitic distension is the enema assafœtida.
4. figurative. The ‘throwing in’ or active introduction of something from without, as of an idea into the mind, or of a statement into an argument, etc.; that which is so introduced, a suggestion, a hint. (Commonly used in 17th cent. of evil thoughts suggested by the devil.) Now rare.
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society > communication > information > hint or covert suggestion > [noun]
feelc1485
inkling1529
intimation1531
insinuation1532
by-warning1542
byword1542
item1561
cue1565
air1567
vent1613
insusurration1614
hinta1616
injection1622
indication1626
infusion1641
side glance1693
ground bass1699
touch1706
side view1747
sidewipe1757
allusion1766
penumbra1770
breath1795
slyness1823
by-hint1853
light1854
shove1857
suggestion1863
sous-entendu1865
point1870
sidewiper1870
sniff1936
the world > existence and causation > existence > intrinsicality or inherence > introduction or bringing in > [noun]
importing1568
importation1616
injection1622
introducement1638
introduction1651
introducing1657
usherage1661
usherance1711
the mind > goodness and badness > badness or evil > evil thought > [noun] > suggested by the devil
injection1622
the world > existence and causation > existence > intrinsicality or inherence > introduction or bringing in > [noun] > that which or one who is introduced
injection1622
introducee1831
1622 T. Stoughton Christians Sacrifice ix. 125 The power of Satan, who by iniection of his fiery darts, so weakned the power wherein God had created him.
1632 F. Quarles Divine Fancies iv. xxxi Satans Injections are like Weeds that fall Into thy Garden, darted or'e the Wall.
1644 P. Hunton Vindic. Treat. Monarchy v. 39 Here I answer once for all to this so frequent an injection.
1698 W. Chilcot Pract. Treat. Evil Thoughts iii. 57 The devil may..disturb the peace and tranquillity of our consciences, by his wicked injections.
1794 R. J. Sulivan View of Nature V. 201 The metaphysical or physical influence of spirits, suggestions..injections of ideas, Bolingbroke declares he cannot comprehend.
1815 A. Burn Mem. (1816) III. 121 Distinguish between the injections of Satan..and the breathings of the Spirit of God.
5. Mathematics. Also injection map(ping). A one-to-one transformation, esp. (formerly) an inclusion.
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the world > relative properties > number > arithmetic or algebraic operations > transformation > [noun] > correspondence > preserving relations or elements
inclusion1870
orthomorphosis1885
isomorphism1892
identity1910
homoeomorphism1918
homomorphism1935
topological mapping or transformation1939
isometry1941
Möbius transformation1941
injection map(ping)1950
monomorphism1954
bijection1963
surjection1964
1950 S. MacLane in Bull. Amer. Math. Soc. LVI. 488 If S is a subgroup of G (notation S ⊂ G), then the injection κ..of S into G is that homomorphism of S into G with κ(s) = s for every s ∈ S.
1963 D. Bushaw Elem. Gen. Topol. 147 If X is a subset of Y, the function j:X → Y defined by j(x) = x is called the injection map from X to Y. The injection map from X to X is called the identity map on X.
1968 E. T. Copson Metric Spaces vii. 86 If the inverse image of each point of E2 is either empty or consists of a single point of E1, the mapping f:E1 → E2 is said to be an injection or a one-to-one mapping. If f:E1 → E2 is an injection, f(x1) = f(x2) implies x1 = x2; and x1 ≠ x2 implies f(x1) ≠ f(x2).
Compounds
C1. General attributive.
a.
injection powder n.
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1803 Med. & Physical Jrnl. 9 189 Shops where ‘injection powders’ are advertized in the windows.
injection syringe n.
injection theory n.
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1881 Trans. Amer. Inst. Mining Engineers 1880–1 9 147 Injection-theory, the theory that a vein was filled first with molten mineral.
b. esp. in terms relating to condensing steam-engines in which the steam is condensed by the injection of a jet of cold water.
injection-cock n.
ΚΠ
1753 J. Smeaton in Philos. Trans. 1751–2 (Royal Soc.) 47 436 This engine consists of a receiver, a steam and an injection-cock.
1825 ‘J. Nicholson’ Operative Mechanic 171 The injection cock for allowing a small stream of water to flow into the condenser.
injection-condenser n.
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1864 Webster's Amer. Dict. Eng. Lang. Injection condenser.
injection-engine n.
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1842 G. W. Francis Dict. Arts Injection Engine.
injection-pipe n.
ΚΠ
1858 P. L. Simmonds Dict. Trade Products Injection-pipe, a pipe for injecting cold water into the condenser of an engine.
1890 Daily News 2 Apr. 2/6 The inflow of water was altogether due to the destruction of the injection-pipes.
injection-valve n.
ΚΠ
1875 E. H. Knight Amer. Mech. Dict. II. 1185/2 The area of the injection-valve of a marine steam-engine is stated at one square inch for every 10-horse power.
1916 A. Garrard Gas, Oil, & Petrol Engines vii. 139 Fig. 65 shows the form of injection valve and pulverizer adopted by the majority of makers for all kinds of fuel except the very heaviest crude oils.
injection-water n.
ΚΠ
1824 ‘R. Stuart’ Descr. Hist. Steam Engine 68 The cistern, for the supply of injection water.
1839 R. S. Robinson Naut. Steam Engine Explained 59 Over the condenser, and in communication with the air pump is the hot well, into which the condensed steam, mixed with the injection water..is pumped.
c. Also frequently in terms relating to the injection of fuel into the combustion chamber of an internal-combustion engine.
injection nozzle n.
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1900 B. Donkin Text-bk. Gas, Oil, & Air Engines (ed. 3) xxiii. 416 Connected to the injection nozzle are two valves, the admission and an overflow.
1946 A. W. Judge Mod. Petrol Engines viii. 326 For larger cylinders two injection nozzles located on opposite sides of the cylinder would be used to give a better admixture of fuel and air.
1971 B. Scharf Engin. & its Lang. xv. 221 The injection nozzle is normally a spring~loaded needle valve.
injection period n.
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1916 A. Garrard Gas, Oil, & Petrol Engines vii. 140 A strong spring tends to keep the valve closed, and a cam on the cam shaft operates..to hold it open during the injection period.
1934 Engineering 3 Aug. 111/2 The fuel pumps..differ from those fitted on most direct-injection engines in that the termination of the injection period is kept constant, the effective stroke of the pump being varied so as to alter the commencement of the injection period.
injection pressure n.
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1930 Engineering 11 Apr. 472/1 It was therefore decided to determine the injection pressure which would give a short injection time, in conjunction with good atomisation.
injection system n.
ΚΠ
1941 Nature 26 July 105/2 The injection system, as compared with many present carburettors, has some slight but definite advantages.
1968 C. F. Taylor Internal-combustion Engine II. xii. 566 A few Diesel-engine builders design and manufacture their own injection systems.
injection time n.
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1930Injection time [see injection pressure n.].
C2.
injection laser n. a laser in which radiation is produced in a suitably shaped semiconductor crystal by the recombination of electrons and holes at a p–n junction as a result of the injection of a large enough number of electrons to produce a population inversion.
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the world > matter > physics > electromagnetic radiation > light > laser > [noun]
laser1960
ruby laser1960
laser gun1961
injection laser1963
phaser1966
dye laser1967
excimer laser1973
laser pen1981
1963 Proc. IEEE 51 602/1 (heading) Doping of semi~conductors for injection lasers.
1966 W. V. Smith & P. P. Sorokin Laser i. 14 In contrast with the other types of lasers, the injection laser is almost two-dimensional, all the light originating from a region within a few microns of the junction plane.
1970 New Scientist 16 July (Suppl.) 16/1 The light emitted from the injection laser depends on the current passed through it.
injection mould n.
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society > occupation and work > equipment > other specific types of equipment > [noun] > moulds or shaping equipment
mouldc1330
share mould1568
matrice1587
matrix1626
form1655
ice mould1781
intaglio1825
hand mould1829
striker1843
wax-mould1849
Savoy mould1866
snap-flask1875
moulding board1882
pipe diea1884
injection mould1945
shell-mould1950
1945 H. Barron Mod. Plastics xvi. 343 Flash is not formed in a well-made injection mould.
injection-moulded adj.
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society > occupation and work > materials > derived or manufactured material > materials having undergone process > [adjective] > shaped by specific means or in specific way
turnedc1440
steam-bent1835
monobloc1909
injection-moulded1947
press-moulded1951
1947 Johnson & Daniels in P. I. Smith Pract. Plastics xiii. 187/1 The second moulding is in thermoplastic resin, injection moulded.
1969 T. C. Thorstensen Pract. Leather Technol. xv. 250 The expansion of the direct-molded sole and injection molded sole shoe is already placing requirements on the leather with regard to oil content and adhesion.
injection moulding n. a process for making moulded articles from plastics or other materials by forcing the heat-softened substance through an orifice into a cold, closed mould.
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society > occupation and work > industry > working with specific materials > working with rubber or plastic > [noun] > moulding plastics
preforming1931
injection moulding1932
compression moulding1940
transfer moulding1940
slush moulding1943
postforming1945
vacuum forming1946
drape forming1958
thermoforming1958
1932 Chem. Abstr. 26 4419 (heading) Working plastic substances by the injection molding process.
1945 H. Barron Mod. Plastics xvi. 344 The essential feature in injection moulding is to force the plastic into the mould at a sufficient speed that the mould is completely filled before the material sets by contact with the cold metal.
1945 H. Barron Mod. Plastics xvi. 344 Materials which are nowadays universally fabricated by injection moulding include cellulose acetate,..polystyrene; methyl methacrylate resins, etc.
1967 M. Chandler Ceramics in Mod. World 10 He [sc. the ceramist] now employs shaping methods such as dry-pressing and injection molding, which are not traditional to his craft.
1973 A. Parrish Mech. Engineer's Ref. Bk. (ed. 11) xvi. 5 Injection moulding is a particularly important process for producing complex mouldings, primarily from thermoplastic powders or granules but also from thermosetting powders.
Categories »
injection point n. Astronautics see sense 1d above.
This entry has not yet been fully updated (first published 1900; most recently modified version published online June 2022).
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n.?1541