germinal disc(n = noun.animal) blastoderm, blastodisc, germinal area - a layer of cells on the inside of the blastula;
is a kind of layer

audio compact disc, cervical disc syndrome, compact disc, compact disc read-only memory, compact disc recordable, compact disc write-once, disc, disc brake, disc drive, disc harrow, disc jockey, disc pack, disc space, germinal, germinal area, hard disc, herniated disc, intervertebral disc, magnetic disc, optic disc, optical disc, ruptured intervertebral disc, slipped disc