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sto·mo·de·umalso sto·mo·dae·um (stō′mə-dē′əm)
n. pl. sto·mo·de·a also sto·mo·dae·a (-dē′ə)
The anterior or oral portion of the digestive tract of an embryo.
[New Latin : Greek stoma, mouth + Greek hodaios, on the way (from hodos, road).]
sto′mo·de′al (-dē′əl) adj.
n, pl -daea or -dea (-ˈdiːə)
(Zoology) the oral cavity of a vertebrate embryo, which is formed from an invagination of the ectoderm and develops into the part of the alimentary canal between the mouth and stomach
[C19: from New Latin, from Greek stoma mouth + hodaios on the way, from hodos way]
ˌstomoˈdaeal, ˌstomoˈdeal adj