blastula

/ˈblæstʃələ/

Other forms: blastulae

Definitions of blastula

1. noun

   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
   synonyms: blastosphere

   types:

   blastocyst, blastodermic vessicle

   the blastula of a placental mammal in which some differentiation of cells has occurred

   type of:

   conceptus, embryo, fertilized egg

   an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life