单词 | amniote |
释义 | amnioten.adj. Zool. A. n. Any vertebrate whose embryo develops within an amnion and chorion and possesses an allantois, i.e. a reptile, bird, or mammal; cf. amniota n. ΘΚΠ the world > animals > vertebrates > [noun] > Amniota allantoidean1859 amniota1879 amniote1887 1887 A. C. Haddon Introd. Study Embryol. iv. 95 The epiblastic epithelium lining it is the exact equivalent of the false amnion or serous membrane of other amniotes. 1893 [see sense B.]. 1926 J. S. Kingsley Outl. Compar. Anat. Vertebr. (ed. 3) 397 In the amniotes the yolk sac reappears. B. adj. Designating or pertaining to an amniote. ΘΚΠ the world > animals > vertebrates > [adjective] > relating to an amniote amniote1893 1893 I. K. Funk et al. Standard Dict. Eng. Lang. (at cited word), Amniota, Amniote, a. & n. 1949 A. S. Romer Vertebr. Body xiii. 474 In the amniote heart the left atrium has no proper blood supply in the embryo. 1992 Atlantic May 10/1 The explosive evolution of the reptiles was a direct result of the development of the amniote egg. This entry has not yet been fully updated (first published 1997; most recently modified version published online November 2010). < n.adj.1887 |
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