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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.


(ˌstoʊ məˈdi əm, ˌstɒm ə-)

n., pl. -de•a (-ˈdi ə)
a depression in the ectoderm of the oral region of a young embryo, which develops into the mouth and oral cavity.
[1875–80; < New Latin < Greek stóm(a) stoma + hodaîon on the way]
sto`mo•de′al, adj.
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References in periodicals archive ?
The pharyngeal gut is separated from the stomodeum by the buccopharyngeal membrane.
Ctenophores display features of bilateral symmetry around the oral-aboral axis: the flattened stomodeum defines the sagittal plane, and an orthogonal tentacular plane passes through the two tentacle pouches.
El stomodeum compuesto por las glandulas salivares, la faringe, el esofago y la valvula carla cual presenta una cubierta quitinosa que la recubre externamente.
During the larval stages, at the junction of the stomodeum with mesodeum, two pairs of caeca are present--an anterior pair formed by a simple tubule and a lateral pair with three lobes (Fig.
Neuroendocrine tumors would not be expected to occur in tissue derived from the primitive stomodeum.
Taxonomic value of the cuticular structures of the stomodeum in Acridomorpha.
Algunos autores han considerado que el nombre de Craneofaringeoma es errado (Russell & Rubestein 1989), puesto que la bolsa de Rathket no es una evaginacion de la faringe sino del stomodeum.
The stomodeum initiates in the preoral cavity and continues with the pharynx and the esophagus, with little morphological differentiation, but with the presentation of external muscles.
The adenohypophysis, or anterior pituitary, is derived from an evagination of oral ectoderm of the dorsal median region of the stomodeum.
3H, I), the extra-embryonic area disappeared after dorsal closure, and the stomodeum direction was changed from upward to downward relative to the egg (Fig.
The stomodeum appeared at stage 13 and the prototrochal girdle with its cilia were completely formed during stage 14 (Fig.
2,10,14) These cells are believed to derive from either the stomodeum or the stomach, which is located in the neck close to the forming tongue at this stage of development.