Definitions
from The Century Dictionary.
- noun An anterior part of the alimentary canal or digestive tract, being so much of the whole enteric tube as is formed at the oral end by an ingrowth of the ectoderm: correlated with proctodæum, which is derived from the ectoderm at the aboral end, both being distinguished from
enteron proper, which is of endodermal origin. - noun In anthozoans, the saclike pharynx, or so-called stomach.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Anat.) A part of the alimentary canal. See under
mesenteron . - noun (Zoöl.) The primitive mouth and esophagus of the embryo of annelids and arthropods.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun Alternative spelling of
stomodeum .
Etymologies
Sorry, no etymologies found.
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Examples
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Foregut: extends from the mouth to the end of gizzard; its epithelium being formed from the ectodermal invagination known as the stomodaeum.
Explanation of Terms Used in Entomology John. B. Smith
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An epiblastic tucking-in at st., the stomodaeum pre-figures the mouth; pr., the proctodaeum, is a similar posterior invagination which will become the anus.
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The anus is formed by a tucking in, the proctodaeum, similar to the stomodaeum.
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The true mouth is formed late by a tucking-in of epiblast, the stomodaeum (s.d.), which meets and fuses with the hypoblast, and is then perforated.
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