单词 | oosperm |
释义 | oospermn. 1. Chiefly Zoology. A fertilized ovum. Now rare. 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 1888 T. H. Huxley & H. N. Martin Course Elem. Instr. Pract. Biol. (rev. ed.) i. 4 It follows that the fertilized ovum is a compound of the egg of the female and a spermatozooid of the male; and it has been accordingly termed the oosperm, by way of distinction from the unfertilized egg. 1893 Bot. Gaz. 18 435 Oösperm (in the etymologically correct use) refers to the fusion product of heterogametes. 1934 Amer. Naturalist 68 291 The cytoplasmic materials in the vicinity of the animal pole of the oösperm usually give rise to endoderm. 1982 Scientia Sinica B. 25 1046 In a primary oosperm the spatial distribution of proteins..of stationary state is important for the further morphodifferentiation caused by cell division. ΘΚΠ the world > plants > part of plant > reproductive part(s) > spore or sporule > cryptogam or plant having spores > [noun] > parts of > cells > reproductive cell or gamete > female gamete or sac containing oospore1865 oosporange1867 oosphere1875 oosperm1892 1892 New Sydenham Soc. Lexicon Oosperm... In Botany, the term is sometimes applied to the oosphere after fertilisation. This entry has been updated (OED Third Edition, June 2004; most recently modified version published online March 2022). < |
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