blastosphere

n. 囊胚、囊胚泡

學術名詞

• 囊胚：生命科學、高中生命科學

英文釋義

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