blastula
English Thesaurus
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 (noun.animal)
hypernym | : | conceptus, embryo, fertilized egg, |
definition | : | 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 (noun.animal) |
part holonym | : | trophoblast, |
definition | : | the membrane that forms the wall of the blastocyst in early development; aids implantation in the uterine wall (noun.animal) |
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