| 释义 |
triplet|ˈtrɪplɪt|
Also 8 triplit.
[f. triple, after doublet; cf. F. triplet (Littré).]
1. A set of three; three persons or things combined or united.
1733Swift Legion Club 183 Such a triplet could you tell Where to find on this side hell? 1824L. Murray Eng. Gram. (ed. 5) I. 444 A very frequent succession of words and phrases, in couplets, or triplets, is also a great blemish in composition. 1851Airy Presid. Addr. Brit. Assoc. 43 Observing stations should be selected..in triplets: the three stations of each triplet having relation to the north boundary, the centre, and the south boundary of the shadow. The Russian Government has..actually equipped six triplets.
2. In various specific uses.
a. Three successive lines of verse, esp. when riming together and of the same length.
1656Earl of Monmouth tr. Boccalini's Advts. fr. Parnass. ii. xiv. (1674) 153 Berni, the Head of those Italian Poets, who have..written facetious things in Triplets. 1697[see 3]. 1751Earl of Orrery Remarks Swift (1752) 188 One of his strictest rules in poetry was to avoid triplets. 1800Malone Life Dryden 525 He sent a second messenger to the book⁓seller, with a very satirical triplet. 1862Borrow Wild Wales lix. (1911) 311 He was a poet by nature, having a muse wonderfully glib at making triplets and quartets.
b. pl. Three children at a birth; sing. one of three at a birth.
1787Garthshore in Phil Trans. LXXVII. 351 [Of] triplets, or three born at once, we find comparatively..few instances in..any..country. 1860Tanner Signs Pregnancy (1862) 110 The presence of three distinct [uterine] double sounds, not isochronous, warrants the diagnosis of triplets. 1905Daily News 25 Jan. 9 His mother said she..had two other boys the same age..The troublesome triplet was remanded.
c. Mus. A group of three notes to be played in the time of two of the same time-value.
1801in Busby Dict. Mus. 1848Rimbault Piano 23 When three notes of one sort are joined together, and have the figure 3 placed over or under them, they are called a Triplet,..and are to be performed in the time of two only of the same kind. 1862Ernst Pauer Programme 8 Mar., With triplets continually increasing in rapidity.
transf.1860Ruskin Unto this Last iv. §82 Triplets of birds and murmur and chirp of insects.
d. Arch. A window of three lights.
1849Freeman Archit. ii. i. vii. 180 The genuine triplet with the higher central light seems hardly to be found in Italy. 1868Daily News 22 July, A window in the Abbey Church, consisting of a triplet of lancets at the west end of the nave.
e. A combination of three plano-convex lenses in a microscope, etc.; also, a microscope having three lenses.
1837Encycl. Brit. (ed. 7) XV. 36 Sir David Brewster has made triplets in which two of the lenses are fluids and the third a solid. 1867[see 3].
f. A counterfeit jewel: see quot., and cf. doublet n. 5.
1877Five Yrs.' Penal Servitude iv. 274 A triplet is made as follows:—Two colourless topazes are prepared for the back and the front. Between these is neatly placed a piece of blue glass, and the three are stuck together with Venice turpentine.
g. A tandem bicycle for three riders.
1894Daily News 3 Sept. 3/3 On a triplet, [they] started to create a record for their type of machine, and succeeded..in riding the fastest mile ever ridden at Herne-hill.
h. Geom. A system of three families of surfaces such that one of each family passes through each point of space.
1891in Cent. Dict.
i. Naut. Three links between the cable and the anchor-ring.
1891in Cent. Dict.
j. Poker. (See quot. 1864.)
1864W. B. Dick Amer. Hoyle 164 Triplets are three cards of the same denomination, and rank higher than two pairs. For example;—three Deuces beat a pair of Aces and Kings. 1887J. W. Keller Game of Draw Poker 14 Full Hand—(Triplets accompanied by a pair)... A full hand beats a flush. 1950[see sandbagger 2].
k. (i) Physics and Chem. A multiplet (sense a) composed of three lines or energy levels. Freq. attrib., esp. designating an atom with two unpaired electrons and S = 1.
1879Proc. R. Soc. XXX. 29 The flame spectrum of magnesium was examined, a green triplet was observed. 1922[see singlet 3 a]. 1934,1937[see intercombination]. 1950G. Herzberg Spectra of Diatomic Molecules (ed. 2) v. 216 Molecules with an even number of electrons have odd multiplicities (singlets, triplets,{ddd}) since S is integral. 1977Nature 3 Nov. 15/1 The Earth has an atmosphere containing diatomic triplet oxygen..essential for life.
(ii) Particle Physics. A multiplet (sense b) of three sub-atomic particles.
1937[singlet 3 b]. 1961M. Gell-Mann in Gell-Mann & Ne'eman Eightfold Way (1964) 12 We have a triplet ρ of vector mesons coupled to the isotopic spin current and a singlet vector meson ω0 coupled to the hypercharge current. 1968[see octet, octette 3 c]. 1975Sci. Amer. Oct. 40/1 The pion is a triplet with an average mass of ·137 GeV and three charge states: +1, 0 and -1.
3. attrib. and Comb., as triplet condenser, triplet head, triplet rhyme, etc.; triplet code Genetics, the accepted version of the genetic code in which amino-acids are specified by three successive nucleotides in a nucleic acid molecule; triplet lily, the American genus Triteleia, N.O. Liliaceæ, having the parts of the flower regularly arranged in threes.
1697Dryden æneid Ded. fj, I frequently make use of Triplet Rhymes. 1867J. Hogg Microsc. i. i. 13 The first triplet achromatic object-glass. 1874H. H. Cole Catal. Ind. Art S. Kens. Mus. App. 287 This bas-relief represents a god with several triplet heads and a great number of hands. 1884Miller Plant-n., Triteleia, Triplet-Lily. 1892Photogr. Ann. II. 548 Microscope and micropolariscope, fitted with Mr. Hughes's patent 5in. triplet condensers. 1900Daily News 21 Apr. 6/3 New amateur triplet records were established..from two miles up to 28 miles. 1957Proc. Nat. Acad. Sci. XLIII. 687 Such triplet codes..have an excess of information, since there are sixty-four different triplets for the twenty amino acids. 1976P. Collard Devel. Microbiol. viii. 107 The correctness of the triplet code was soon verified by the elegant experiments of Nirenberg. |