proamnion

Etymology

From pro- + amnion.

proamnion means an area of the blastoderm at the cephalic end of a vertebrate embryo, in which there is no mesoderm separating the ectoderm and endoderm. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

An area of the blastoderm at the cephalic end of a vertebrate embryo, in which there is no mesoderm separating the ectoderm and endoderm