| 单词 | zona pellucida |
| 释义 | > as lemmaszona pellucida zona pellucida n. the transparent membrane forming the cell-wall of the ovum in Mammalia. ΘΚΠ the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > zones of zona pellucida1841 zona radiata1881 1841 M. Barry in Philos. Trans. (Royal Soc.) 132 116 We saw the incipient chorion, when rising from the ‘zona pellucida’ in the mammiferous ovum, to leave a stratum of unappropriated cells behind it on the ‘zona’. < as lemmas |
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