blastula
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* danh từ- số nhiều blastulas, blastulae
- (sinh học) phôi nang
Định nghĩa tiếng Anh
n. 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