Thesaurus: blastosphere

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1. n. The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.
2. 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
3. The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum. Note: [See Illust. of Invagination.]
4. The hollow globe or sphere formed by the arrangement of theblastomeres on the periphery of an impregnated ovum.
5. 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