英语词汇“protovum”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

† protovum n. Obsolete rare (a) Botany a female gametophyte; (b) Zoology an ovum in an early (or abortive) stage of development; cf. metovum n.

ΚΠ

1878 Amer. Naturalist 12 819 The term ‘pro-embryo’ has been misapplied by many writers to the structure which proceeds immediately from the germination of the spore of Chara, and which is rather a prothallium or a protovum.

1879 tr. E. Haeckel Evol. Man I. 223 The protovum is thus transformed into the metovum (after-egg) which is many times larger..but..is only a single..cell.

1890 Proc. Amer. Philos. Soc. 28 135 It may be in some cases the polar bodies may be large enough to merit the name of protova, especially the first one.

单词	protovum
释义	> as lemmas protovum † protovum n. Obsolete rare (a) Botany a female gametophyte; (b) Zoology an ovum in an early (or abortive) stage of development; cf. metovum n. ΚΠ 1878 Amer. Naturalist 12 819 The term ‘pro-embryo’ has been misapplied by many writers to the structure which proceeds immediately from the germination of the spore of Chara, and which is rather a prothallium or a protovum. 1879 tr. E. Haeckel Evol. Man I. 223 The protovum is thus transformed into the metovum (after-egg) which is many times larger..but..is only a single..cell. 1890 Proc. Amer. Philos. Soc. 28 135 It may be in some cases the polar bodies may be large enough to merit the name of protova, especially the first one. extracted from proto-comb. form < as lemmas
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> as lemmas