embryonic disc
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Related to embryonic disc: embryonic disk, germ disc
em·bry·on·ic disc
a flattened, almost circular bilaminar plate of cells derived from the embryoblast in the second week of human development.
em·bry·on·ic disc
(em-brē-onik disk)Flattened, almost circular bilaminar plate of cells derived from the embryoblast in the second week of human development.