| 单词 | polymorph |
| 释义 | polymorph|ˈpɒlɪmɔːf|
[mod. f. Gr. πολύµορϕ-ος of many forms, f. πολυ-, poly- + µορϕή form. Cf. F. polymorphe adj. multiform.]
1. Nat. Hist. A polymorphous organism, or an individual of a polymorphous species. Also attrib.
1828Webster, Polymorph, a name given by Soldani to a numerous tribe or series of shells, which are very small, irregular and singular in form, and which cannot be referred to any known genus. Dict. Nat. Hist. 1890in Cent. Dict. 1895Syd. Soc. Lex., Polymorph, one of a series the members of which are characterised by Polymorphism. 1950Evolution IV. 298/1 There is an interesting correlation between habitat differences and shifts in polymorph frequencies. 1958Proc. Zool. Soc. CXXXI. 87 Comparisons are often made between different polymorphs in the same population. 1975Zool. Jrnl. CLXXVII. 334 This species [sc. Charaxes zoolina] is a simple dual polymorph with respect to wing shape.
2. Chem. and Min. A substance that crystallizes in two or more different forms: see polymorphous 3. In mod. use, each of the different forms of such a substance.
1890in Cent. Dict. 1902Jrnl. Chem. Soc. LXXXII. ii. 448 With polymorphs..a quite different behaviour is observed. The melting point of the stable form is scarcely altered by the addition of the unstable modification. 1944[see edisonite]. 1957G. E. Hutchinson Treat. Limnol. I. x. 660 CaCO3 exists under ordinary conditions in nature in two crystalline polymorphs, calcite and aragonite. 1973Nature 23 Mar. 241/1 Anhydrite, CaSO4, is the higher temperature polymorph of calcium sulphate.
3. Biol. A polymorpho-nuclear leucocyte.
1904Brit. Med. Jrnl. 10 Sept. 583 The polymorpho-nuclear neutrophiles, or as I shall call them for the sake of brevity, polymorphs... There is no relation between the transitionals and the polymorphs. Ibid. 584 They [transitionals] are not increased in number in the blood in a polymorph leucocytosis. 1970Nature 5 Sept. 1052/1 Red cells, monocytes and the majority of polymorphs had grain densities within the range of control preparations. 1977Lancet 29 Jan. 225/1 Evidence indicates that steroids prevent the accumulation of macrophages and polymorphs in inflammatory areas. |
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