sto·mo·de·um 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 alimentary canal of an embryo.
[New Latin : Greek stoma, mouth + Greek hodaios, on the way (from hodos, road).] sto'mo·de'al (-dē'əl) adj.