| endoderm | (n) the inner germ layer that develops into the lining of the digestive and respiratory systems, Syn. hypoblast, entoblast, entoderm, endoblast |
| Hypoblast | n. [ Pref. hypo- + -blast. ] (Biol.) The inner or lower layer of the blastoderm; -- called also |
| Hypoblastic | a. (Biol.) Relating to, or connected with, the hypoblast; |