the transparent membrane forming the cell-wall of the ovum in Mammalia.
| 单词 | θ18952 |
| 释义 | the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > zones of (3) zona pellucida1841 the transparent membrane forming the cell-wall of the ovum in Mammalia. zona radiata1881 a radially striated form of the zona pellucida surrounding the ova of certain vertebrates as seen in the light microscope. Subcategories:— formation of zones in (1) |
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