Embryology. An acellular layer of protoplasm lying between the blastomere and the yolk of a meroblastic egg.
| 单词 | θ18945 |
| 释义 | the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > protoplasm or cytoplasm (3) periblast1885 Embryology. An acellular layer of protoplasm lying between the blastomere and the yolk of a meroblastic egg. ovoplasm1890 = ooplasm, n. 1. ooplasm1899 Mycology. In an oomycete, esp. one of the order Peronosporales: the central portion of the oogonial cytoplasm, which becomes the oosphere. |
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