English noun: blastosphere | |||
1. | blastosphere (animal) 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 | blastula | ||
Broader (hypernym) | conceptus, embryo, fertilized egg | ||
Narrower (hyponym) | blastocyst, blastodermic vessicle | ||
Part holonym | blastocele, blastocoel, blastocoele, cleavage cavity, segmentation cavity, trophoblast | ||