Germinal membrane

(Biol.)

Same as Blastoderm.

germinal membrane

blas·to·derm

, blastoderma (blas'tō-derm, -tō-der'ma), The thin, disc-shaped cell mass of a young embryo and its extraembryonic extensions over the surface of the yolk; when fully formed, all three primary germ layers (ectoderm, endoderm, and mesoderm) are present. Synonym(s): germ membrane, germinal membrane, membrana germinativa [blasto- + G. derma, skin]

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