the inner layer of cells of the embryo, from which is formed the lining of the digestive tract, of other internal organs, and of certain glands
Origin of endodermendo- + -derm
The innermost of the three primary germ layers of an animal embryo, developing into the gastrointestinal tract, the lungs, and associated structures. Also called hypoblast.
From endo- + Ancient Greek δέρμα (derma, “skin”).