Pronunciation: (en'du-dûrm"), [key]
1. Also called endoblast. Embryol.the innermost cell layer of the embryo in its gastrula stage.
2. Anat.the innermost body tissue that derives from this layer, as the gut lining. Also,entoderm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.