noun endoderm The innermost layer of cells or tissue of an embryo in early development, or the parts derived from this, which include the lining of the gut and associated structures. 1
noun endoderm the inner germ layer of an animal embryo, which gives rise to the lining of the digestive and respiratory tracts 0
noun endoderm 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 0
