参考词典中blastodermic vesicle的常规释义：
基本释义
英英解释
- early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs
[同]
blastodermic vesicle, blastula
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