单词 | pulsation |
释义 | pulsationn. I. The action or an act of pulsating or pulsing. 1. a. The beating or throbbing of the pulse; rhythmical expansion and contraction of the heart, an artery, etc. ΘΚΠ the world > life > the body > vascular system > circulation > pulsation > [noun] pulsea1398 pulsation?a1425 stroke1538 pulsidge1600 pulsion1607 mication1686 ictus1707 beat1755 pulse beat1838 blood-beat1851 ?a1425 tr. Guy de Chauliac Grande Chirurgie (N.Y. Acad. Med.) f. 22v (MED) Signe þat aposteme is resolued is liȝtnez & wantyng of pulsacioun or betyng [?c1425 Paris smytinge; L. pulsationis]. ?a1425 MS Hunterian 95 f. 153 (MED) Ranclynge in a wounde..is wiþ swellinge and pulsacioun boþe in þat place þat þe sore is inne and in alle þe member. ?1541 R. Copland Galen's Fourth Bk. Terapeutyke sig. Fijv, in Guy de Chauliac's Questyonary Cyrurgyens Yf there be all redy vehement pulsacyon, in such wyse that there is no more hope of the curacyon of the sayd partyes. 1588 J. Read tr. F. Arcaeus Compend. Method i. iv. f. 10 We use Instrumentum Lenticulare..while the Dura mater is mooved with continual pulsation. 1615 H. Crooke Μικροκοσμογραϕια 859 This motion of the Arteries is called pulsus or pulsation..which is absolued by dilatation and contraction. 1664 H. Power Exper. Philos. i. 9 In a greater Louse you might see this pulsation of her heart through her back also. 1703 T. Gibson Anat. Humane Bodies Epitomized (ed. 6) ii. 73 That motion which is impressed upon the Lympha from the pulsation of the Heart, whereby it is made to circulate by the Lympheducts. 1785 J. C. Lettsom Let. 15 Sept. in J. J. Abraham Lettsom (1933) xxii. 442 He declares he was the other day dead for four minutes, not having pulsation in the heart or arteries. 1825 Lancet 29 Oct. 192/1 Sometimes the pulsation is so strong, when the surface of the epigastric region is exposed to view, as to be visible to the eye. 1878 J. S. Bristowe Treat. Theory & Pract. Med. (ed. 2) ii. iv. 501 Dilatation and pulsation of the larger veins. 1919 J. Conrad Arrow of Gold iv. v. 155 Presently my ear caught the faint and regular pulsation of her heart, firm and quick. 1999 Proc. National Acad. Sci. U.S.A. 96 2995 Cultured cells from embryonic liver expressed α-fetoprotein, and cells from heart continued to show pulsation in vitro. b. As a count noun: a beat, a throb, a pulse (of the heart, an artery, etc.). ΘΚΠ the world > life > the body > vascular system > circulation > pulsation > [noun] > diastole pulsea1398 diastole1578 pulsation1612 throb1653 tick1823 1612 J. Cotta Short Discouerie Dangers Ignorant Practisers Physicke 15 Her pulse should stand and intermit sometimes three or four pulsations. 1645 J. Howell Epistolæ Ho-elianæ i. xxxvii. 69 The Physitians hold, that in evry well dispos'd body, ther be above 4000 Pulsations evry hour. 1744 H. Brooke Female Seducers in Moore Fables 135 Her frame with new pulsations thrill'd. 1825 Lancet 30 July 120/1 The pulsations of the brain may be very distinctly observed. 1884 B. Bramwell Dis. Heart 751 Cardiographic tracings are usually obtained from the pulsations of the left apex-beat. 1967 Canad. Med. Assoc. Jrnl. 5 Aug. 296/2 Her temporal arteries were not enlarged or tender, but no pulsations could be felt. 1993 S. J. Ettinger Pocket Compan. Textbk. Vet. Internal Med. lxxv. 354 Systolic jugular pulsations, venous engorgement of the superficial and jugular veins, and a positive hepatojugular reflex are present. c. figurative. Cf. pulse n.2 2. ΚΠ 1765 L. Sterne Life Tristram Shandy VIII. xvi. 47 It could neither give fire by pulsation—or receive it by sympathy. 1800 D. Everett Daranzel ii. ii. 17 Yet this aching sense Could ne'er resign thee but with life's pulsation. 1848 H. Rogers Ess. (1874) I. vi. 327 The pleasure..of beholding the pulsations, so to speak, of intellectual life. 1885 Manch. Examiner 15 Apr. 3/1 A little book..warm with the pulsation of individual thought. 1910 E. M. Forster Howards End xiii. 105 As a heart that certainly beats, but with no pulsation of humanity. 1991 R. Howard tr. E. M. Cioran Anathemas & Admirations vii. 140 To no one is it vouchsafed, in a state of neutrality, to perceive the pulsation of Time. 2. gen. a. Rhythmical beating, vibration, or undulation; = pulse n.2 4b. ΘΚΠ the world > movement > motion in specific manner > alternating or reciprocating motion > pulsation > [noun] throbbing1573 beatinga1616 pulse1657 pulsation1658 flaffing1828 flackering1855 1658 J. Rowland tr. T. Moffett Theater of Insects in Topsell's Hist. Four-footed Beasts (rev. ed.) ii. 1104 They [sc. worms] move from place to place with a certain drawing and pulsation [L. pulsu]. 1751 G. Lavington Enthusiasm Methodists & Papists: Pt. III 84 The Dæmons..not indeed emitting any Voice by Pulsation and Sound, but injecting their Words without any Noise. 1841 R. W. Emerson Thoughts on Art in Dial Jan. 370 The pulsation of a stretched string or wire gives the ear the pleasure of sweet sound. 1850 Ld. Tennyson In Memoriam xii. 18 As a dove..Some dolorous message knit below The wild pulsation of her wings. View more context for this quotation 1927 E. G. Richardson Sound x. 236 The lower pitch limit is about 16 vibrations per second. Slow vibrations..remain unperceived as tones if their rate of pulsation falls below this limit. 1954 Grove's Dict. Music (ed. 5) IV. 600/1 The regular but subtle rhythmic pulsation which animates 4–4 time and must be present in every good jazz performance. 1993 E. N. K. Clarkson Invertebr. Palaeontol. & Evol. (ed. 3) ix. 278/1 One of the aspidochiroate suborders, the Elasipoda, has swimming representatives which keep themselves afloat by pulsation, like jellyfish. b. As a count noun (usually in plural): a beat, a vibration, an undulation; = pulse n.2 4a. ΘΚΠ the world > movement > motion in specific manner > alternating or reciprocating motion > pulsation > [noun] > a pulsation pulse1616 throb1651 pulsation1832 1832 D. Brewster Lett. Nat. Magic ix. 242 A low continuous murmuring sound beneath his feet, which gradually changed into pulsations as it became louder. 1866 Duke of Argyll Reign of Law iii. 137 The pulsations of the wing in most birds are so rapid that they cannot be counted. 1878 T. H. Huxley Physiography (ed. 2) xi. 171 In the open sea, the wave or pulsation is propagated, but the mass of the water..remains stationary. 1922 H. S. Jones Gen. Astron. xiii. 342 The most plausible theory yet advanced [to explain Cepheid variability] is that the variations of radial velocity are due to periodic pulsations of the star. 1993 Urb 7 July 17/1 Let the flood of ancestral percussion enter your body temple, as your heart beats in synch with the tribal bass pulsations. II. A striking or knocking. 3. The action or an act of striking, knocking, or beating; a blow, a strike. Now rare.In quot. 1891: a strike made by a pulsator (pulsator n. 3b). ΘΚΠ the world > movement > impact > striking > beating or repeated striking > [noun] beating?c1225 quassation?a1425 bunchingc1440 tunsionc1440 hammering1563 pealing1582 flapping1629 pulsation1656 dousing1721 pummelling1755 pommelling1788 dunching1789 walloping1837 whacking1862 shit-kicking1954 beat-down1989 the world > movement > impact > striking > [noun] > a stroke or blow dintc897 swengOE shutec1000 kill?c1225 swipc1275 stroke1297 dentc1325 touchc1325 knock1377 knalc1380 swapc1384 woundc1384 smitinga1398 lush?a1400 sowa1400 swaipa1400 wapc1400 smita1425 popc1425 rumbelowc1425 hitc1450 clope1481 rimmel1487 blow1488 dinga1500 quartera1500 ruska1500 tucka1500 recounterc1515 palta1522 nolpc1540 swoop1544 push1561 smot1566 veny1578 remnant1580 venue1591 cuff1610 poltc1610 dust1611 tank1686 devel1787 dunching1789 flack1823 swinge1823 looder1825 thrash1840 dolk1861 thresh1863 mace-blow1879 pulsation1891 nosebleeder1921 slosh1936 smackeroo1942 dab- 1656 T. Blount Glossographia Pulsation, a beating, striking, knocking or thumping. 1676 E. Coles Eng. Dict. Pulsation, a beating upon. 1768 W. Blackstone Comm. Laws Eng. III. viii. 120 The Cornelian law de injuriis prohibited pulsation as well as verberation; distinguishing verberation, which was accompanied with pain, from pulsation, which was attended with none. 1891 Blackwood's Edinb. Mag. Sept. 322 A large flap of wood bestows a smart box on the ear,..on the surface of no. 2 pan. I estimated the number of these pulsations at 110 per minute. Compounds pulsation theory n. Astronomy a theory explaining the behaviour of certain types of variable stars as due to the expansion and contraction of, or ripples in, their outer layers. ΚΠ 1924 Proc. National Acad. Sci. 11 266 This feature of the velocity curves of η Aquilæ occurs at the time of the greatest radial expansion of the star as a whole, on the basis of pulsation theory, with a lag phase of the upper layer. 1953 W. M. Smart Origin of Earth viii. 163 The most satisfactory theory accounting for the periodic physical changes exhibited by a Cepheid is the pulsation theory. 1993 S. Pottasch in A. Mampaso et al. Infrared Astron. (2003) ii. 82 General considerations from pulsation theory show that there is a pulsation ‘constant’ Q for a given type of star (e.g. red giant). Derivatives pulˈsational adj. of, relating to, or characterized by pulsation. ΘΚΠ the world > movement > motion in specific manner > alternating or reciprocating motion > pulsation > [adjective] pulsativea1398 pulsatile?a1425 throbbinga1450 flaffinga1522 pulsing1559 pulsive1600 pulsatory1613 pulsanta1656 quabbing1663 throbby1726 pulsating1732 throbbing1847 pulsational1882 interpulse1948 1882 Contemp. Rev. Oct. 636 The striations seen athwart the tail..would be explained..as due to the observed pulsational manner in which the envelopes are raised. 1958 M. Schwarzschild Struct. & Evol. Stars vii. 242 If there exists under special circumstances an energizing mechanism for the pulsations which is stronger than the damping mechanisms, the pulsations will not be damped and pulsational instability will occur. 1994 Nature 24 Nov. 317/3 The single-channel model apparently explained a lot of things, including..the pulsational properties of many white dwarfs. pulˈsationally adv. ΘΚΠ the world > movement > motion in specific manner > alternating or reciprocating motion > pulsation > [adverb] throbbingly1693 a-throb1856 pulsationally1963 1963 A. Grünbaum in P. A. Schlipp Philos. Rudolf Carnap xx. 623 These philosophers maintained that the temporal order is discrete rather than dense, the events of nature occurring seriatim or ‘pulsationally’. 1969 Nature 19 July 280/1 Thermonuclear reactions are extremely effective in pulsationally destabilizing a degenerate star. 1994 Science Jan. 53/3 Recent model calculations indicate that..these stars should become pulsationally unstable for masses around 14 to 20 M☉. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022). < |
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