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单词 nematogenic
释义

nematogenicadj.

Brit. /nɛˌmatə(ʊ)ˈdʒɛnɪk/, /nᵻˌmatə(ʊ)ˈdʒɛnɪk/, /ˌnɛmətə(ʊ)ˈdʒɛnɪk/, U.S. /nəˌmædəˈdʒɛnɪk/, /ˈˌnimədəˈdʒɛnɪk/, /ˈˌnɛmədəˈdʒɛnɪk/; see also nemato- comb. form.
Origin: Formed within English, by derivation. Etymons: nematogen n., -ic suffix, nemato- comb. form, -genic comb. form.
Etymology: In sense 1 < nematogen n. + -ic suffix; in sense 2 < nemato- comb. form + -genic comb. form (compare later nematogen n. 2). Compare slightly earlier nematogenous adj.
1. Zoology. Of the nature of a nematogen; relating to, or characteristic of a nematogen; derived from a nematogen (see nematogen n. 1). Obsolete.
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the world > animals > invertebrates > bodies or parts > [adjective] > producing filiform embryo
nematogenous1877
nematogenic1883
1883 C. O. Whitman in Mittheilungen aus Zool. Station zu Neapel 4 59 These four Dicyemids were all obtained from small Eledones, in which most of the parasites were Nematogenic.
1883 Amer. Naturalist 17 297 Professor Whitman considers their reproduction, embracing the phenomena of transition from the rhombogenic to the nematogenic condition.
1885 Encycl. Brit. XVIII. 259/1 The embryos are of two kinds, nematogenic or vermiform, and rhombogenic or infusiform.
1899 Science 10 Mar. 370/1 Both the male (infusoriform) and female Dicyemid migrate into the kidneys of the young Octopus and there form colonies of nematogenic females before males are produced.
2. Physical Chemistry. Able to behave as a liquid crystal; of or relating to a nematogen (see nematogen n. 2).
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1942 J. Needham Biochem. & Morphogenesis iii. 663 A smectogenic crystal has its molecules arranged in planes..; a nematogenic crystal has them arranged so as to interleave each other.
1962 G. W. Gray Molecular Structure & Properties of Liquid Crystals i. 5 If the compound under consideration is nematogenic, i.e. able to produce a nematic mesophase, then, at the melting point, the crystals will again collapse.
1967 Science 21 July 262/1 The F19 spectrum of a solution of hexafluorobenzene in the nematogenic solvent p-di-n-hexyloxyazoxybenzene is shown in Fig. 8 (top).
1993 Philos. Trans. (Royal Soc.) A. 344 403 The essential element is the combination of internal flexibility and nematogenic tendencies. Thus we shall not discuss LCPs [= liquid crystal polymers] that are simply very long, but essentially inflexible, rods.
2001 Physical Rev. Lett. 86 3915 We calculate the interaction between two spherical colloidal particles embedded in the isotropic phase of a nematogenic liquid.
This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).
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adj.1883
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