n. [ Gr. blasto`s sprout + E. sphere. ] (Biol.) The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum. [ See Illust. of Invagination. ] [ 1913 Webster ]
(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.blastosphere
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. [ Gr. blasto`s sprout + E. sphere. ] (Biol.) The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum. [ See Illust. of Invagination. ] [ 1913 Webster ]