Blastodisk Definition
blastōdisk, blastədisk
noun
Webster's New World
(biology) A round, flattened region of cells from which the embryo of many vertebrates begins to develop in the fertilized ovum; a germinal disk.
Wiktionary
(biology) A round, flattened region of cells from which the embryo of many vertebrates begins to develop in the fertilized ovum; a germinal disk.