sto·mo·de·um also sto·mo·dae·um 
(stō′mə-dēəm)
(stō′mə-dēəm)n. pl. sto·mo·de·a also sto·mo·dae·a (-dēə)
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·deal (-dēəl) adj.