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also 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
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References in periodicals archive ?
Two mutually perpendicular planes of symmetry run along the oral-aboral axis: the sagittal plane in which the flattened stomodaeum lies, and the tentacular plane passing through the two tentacle pouches (Fig.
tuberculata: expression was weak in the stomodaeum and oral field, which degenerate at metamorphosis, and stronger in the stomach and rectum, which are retained in the adults.