What is "blastulae"

n. (plural of blastula English)

See blastula

1. 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 [syn: blastodermic vesicle]

2. [also: blastulae (pl)]