blastula
英 ['blæstjʊlə]
美['blæstʃʊlə]
- n. [胚] 囊胚，囊胚泡
英英释意
- 1. 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