blastula
/'blæstjulә/
📖 中文释义
- n. 囊胚
📘 English Definition（英文释义）
- 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