| 单词 |
subzonal |
| 释义 |
subˈzonal, a. Embryol. [sub- 1 b.] Designating a layer of cells beneath the zona pellucida of an ovum, constituting the basis of the chorion.
1877W. Turner Hum. Anat. 864 The sub-zonal membrane consists essentially of a layer of cells, which was originally continuous with the cellular layer lining the inner surface of the proper amnion. Ibid., The formation of the amnion and sub-zonal outer layer of the persistent chorion. |

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