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单词 oosperm
释义

oospermn.

Brit. /ˈəʊə(ʊ)spəːm/, U.S. /ˈoʊoʊˌspərm/
Forms: 1800s– oosperm, 1800s– oösperm.
Origin: Formed within English, by compounding. Etymons: oo- comb. form, -sperm comb. form.
Etymology: < oo- comb. form + -sperm comb. form.
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.
2. Botany. A zygote, esp. of an alga or fungus. Obsolete. rare.Apparently only attested in dictionaries or glossaries.
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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n.1888
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