单词 | pulsator |
释义 | pulsatorn. 1. A person who or thing which knocks or strikes. Now rare.Formerly spec. an organist (in later use archaic or historical); also (quot. 1753) the death-watch beetle, Xestobium rufovillosum. ΘΚΠ the world > movement > impact > striking > [noun] > person or animal that strikes smiterc1230 blow-giver1548 strikera1586 pulsator1656 hitter1813 1656 T. Blount Glossographia Pulsator, one that knocks or strikes. 1753 Chambers's Cycl. Suppl. Pulsator, a name given by some writers to that species of beetle, commonly known among us by the name of the death-watch. 1755 S. Johnson Dict. Eng. Lang. Pulsa′tor, a striker, a beater. 1836 E. Howard Rattlin xx The pulsator, with pointed toe.., would make a progress in a direct line. 1900 Proc. Mus. Assoc. 26 193 In the fourteenth century the keys of the organ were so large that the performer was termed a pulsator or smiter;..the right mode of smiting the keys was with the closed fist. 1938 Musical Times Aug. 591/1 It's all to the good, when a concert-hall has an organ, that it should be used..to attract people to some of the classics we ancient pulsators love. ΘΚΠ society > law > administration of justice > court proceedings or procedure > action of courts in claims or grievances > party in litigation > [noun] > plaintiff cravera1300 actora1325 askera1325 plaintiffa1325 plainer1340 challengera1382 pursuanta1393 follower1397 suer1423 pursuer1430 plainant1437 suitor1454 suit maker1469 complainant1495 plainandc1500 callerc1503 tabler1517 complaintiffc1533 complainer?1542 impleader1583 pledant1599 proceedera1618 querent1720 pulsator1730 demandeur1818 movant1875 rapper1904 1730 N. Bailey et al. Dictionarium Britannicum Pulsa′tor, the Plaintiff or Actor. 3. a. Any of various devices for producing a regular mechanical or electrical pulsation or oscillation.In quot. 1884: = pulsometer n. 2. ΚΠ 1872 T. A. Edison Notebk. 7 Feb. in R. V. Jenkins et al. Papers Thomas A. Edison (1989) I. ix. 453 It is not necessary that the pulsator should be exactly as I now see it. 1881 Science 31 Dec. 622/2 In the simplest pulsator, the two walls dilate and contract at the same time under the action of forcing the air from the pumps. 1884 E. H. Knight Pract. Dict. Mech. Suppl. 727/2 Pulsator, a name for the Pulsometer. 1933 Science 29 Dec. 607/1 A simple pneumatic pulsator. The apparatus here described can be used with any type of laboratory apparatus in which it is desired to (1) move a fluid into and out of a vessel, or (2) to intermittently move a liquid in a given direction. 1940 J. B. S. Haldane Sci. & Everyday Life vii. 180 This is called the ‘pulsator’, and is a bag which presses rhythmically on the chest and stomach and is very useful in cases of partial paralysis. 1984 Amer. Midland Naturalist 112 370 Fishes were captured..with a boat-mounted generator coupled with a variable voltage pulsator. 1999 Daily Record (Nexis) 16 Jan. (Mag. section) 18 This hairdryer is light and easy to use. The special pulsator nozzle certainly speeds up drying time. b. Mining. A machine for dressing diamond-bearing material by vibrating it with water, so disintegrating the waste material, which is removed by passage through a sieve. ΚΠ 1890 Pall Mall Gaz. 13 Feb. 2/1 The residue of divers stones of divers sorts and sizes is then jogged about with more water in the ‘pulsator’... The machine is a huge framework of graduated sieves and runlets. 1909 Westm. Gaz. 13 Dec. 4/1 Sometimes as many as 8,000 carats of diamonds come from the pulsator in one day, representing about £20,000 in value. 1981 Daily Dispatch (East London, S. Afr.) 25 June 1 He had removed a bucket of washed gravel from the pulsator sieve without paying much attention to what he was doing. c. Agriculture. An air valve device in a milking machine which releases the suction on the teat intermittently so as to simulate the sucking action of a calf. ΘΚΠ the world > food and drink > farming > animal husbandry > dairy farming > [noun] > milking > milking machinery or apparatus milk tube1839 siphon1844 tapper1884 pulsator1907 releaser1913 inflation-rubber1950 milk line1950 1907 Jrnl. Royal Agric. Soc. 68 133 By another flexible connection the pail communicates with a vacuum pipe, and an air exhaust, by which the pulsators are actuated. 1950 N.Z. Jrnl. Agric. 80 568/2 Efficient milking is not possible with leaking pulsators. 2005 Western Mail (Cardiff) (Nexis) 1 Feb. 4 Components were widely resourced—the stallwork from Australia and the meters and pulsators from Israel—and now..the 170-cow herd can be milked in just over an hour. 4. Astronomy. a. A star that oscillates in shape and size, such as a variable star. ΚΠ 1962 Astrophysical Jrnl. 136 899 Earlier stellar types than the known pulsators presumably find different short-period non-spherical modes for oscillation. 1995 Astron. & Astrophysics 285 113/1 The δ Scuti stars are pulsators located on or around the end of the Main Sequence. 2000 Science 15 Sept. 1889/1 The amplitude is decreasing. This is virtually unique among the very regular Cepheid class and suggests that overtone pulsators are sensitive to envelope characteristics in a different way than fundamental pulsators. b. A pulsar, esp. an X-ray pulsar. ΘΚΠ the world > the universe > star > kind of star > small star > [noun] > dwarf > neutron star neutron star1934 pulsar1968 pulsator1977 magnetar1992 1977 Internat. Astron. Union Circ. No. 3039. 1 R. H. Becker, S. H. Pravdo,..Goddard Space Flight Center, report the discovery of an x-ray binary pulsator. 1978 Nature 7 Dec. 564/2 They are two of the most rapid pulsators—those in the Crab and Vela nebulas—and it was through their pulsed optical emission that the star responsible was ultimately identified in each case. 1981 Philos. Trans. (Royal Soc.) A. 301 557 The discovery..of a twin set of X-ray pulsators. This entry has been updated (OED Third Edition, September 2007; most recently modified version published online June 2022). < n.1656 |
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