Blastoderm

Adjective, Noun

blas=to=derm

WORDNET DICTIONARY

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

is a kind of layer

Derived forms adjective blastodermatic₁, adjective blastodermic₁

Blastoderm, n. [Gr. blasto`s sprout + E. derm.].

the early stage of an embryo after the first cleavages of the ovum; also, the layer of cells of which the early embryo is composed; [PJC]