Endoderm
Pronunciation : En"do*derm
Part of Speech : n.
Etymology : [Endo- + Gr. (Biol.) (a) The inner layer of the skin or integument of an animal. (b) The innermost layer of the blastoderm and the structures derived from it; the hypoblast; the entoblast. See Illust. of Ectoderm.
Source : Webster's Unabridged Dictionary, 1913