| 单词 | animal pole |
| 释义 | > as lemmasanimal pole animal pole n. Embryology the apex of the animal hemisphere of an ovum or blastula (cf. pole n.2 11); contrasted with vegetal pole. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > fertilized ovum and parts primitive streak1833 mulberry mass1851 morule1857 morula1875 stirp1875 cytula1876 vegetative pole1876 genoblast1877 mulberry germ1879 parent kernel1879 vegetal pole1881 animal pole1882 amphiaster1885 oosperm1888 segmentation sphere1898 1882 Philos. Trans. (Royal Soc.) 173 362 Our earliest stage showed a vertical furrow at the upper or animal pole, extending through about one-fifth of the circumference. 1926 H. E. Jordan & J. E. Kindred Textbk. Embryol. v. 32 When the yolk is more abundant,..it tends to segregate at one pole, thus determining a yolk-free pole, the animal pole, and a yolk-laden pole, the vegetal pole. 1998 Proc. National Acad. Sci. U.S.A. 95 3673/1 The animal pole of the egg gives rise..to the mouth-bearing pole of the cnidarian polyp and to the head of the worm. < as lemmas |
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