单词 | exocyclic |
释义 | > as lemmasexocyclic exocyclic adj. Brit. /ˌɛksə(ʊ)ˈsʌɪklɪk/ , /ˌɛksə(ʊ)ˈsɪklɪk/ , U.S. /ˌɛksoʊˈsaɪklɪk/ , /ˌɛksoʊˈsɪklɪk/ (a) Zoology of an irregular sea urchin, having the anus displaced from the apical position in which it is found in the regular forms; (b) Chemistry situated outside the ring.ΚΠ 1888 G. Rolleston & W. H. Jackson Forms Animal Life (ed. 2) 562 Anus exocyclic. 1913 J. B. Cohen Org. Chem. Adv. Students II. iv. 298 Dispersivity..is increased by the double bond in the side-chain (exocyclic) as compared with that in the nucleus (endocyclic). 1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. xvi. 594 The exocyclic atoms are markedly electronegative. 1966 Treat. Invertebrate Palaeontol. (Amer. Geol. Soc.) U.I.U 289/2 This exocyclic tendency was not very successful in the Diadematacea. < as lemmas |
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