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[stoh-muh-dee-uh m, stom-uh-] /ˌstoʊ məˈdi əm, ˌstɒm ə-/
noun, plural stomodea
[stoh-muh-dee-uh, stom-uh-] /ˌstoʊ məˈdi ə, ˌstɒm ə-/ (Show IPA).
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 (neuter singular) on the way; akin to -ode2
Related forms
stomodeal, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for stomodeum
  • Four branchial grooves are present: the stomodeum is well-marked, and the bucco-pharyngeal membrane has disappeared.
  • The heart originally lies on the ventral aspect of the pharynx, immediately behind the stomodeum.
  • Thus, this rotation might be caused by the migration of these anterior segments around the stomodeum during development.
British Dictionary definitions for stomodeum


/ˌstəʊməˈdiːəm; ˌstɒm-/
noun (pl) -daea, -dea (-ˈdiːə)
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
Derived Forms
stomodaeal, stomodeal, adjective
Word Origin
C19: from New Latin, from Greek stoma mouth + hodaios on the way, from hodos way
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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stomodeum in Medicine

stomodeum sto·mo·de·um (stō'mə-dē'əm)
A midline ectodermal depression ventral to the embryonic brain and surrounded by the mandibular arch. It becomes continuous with the foregut and forms the mouth.

sto'mo·de'al adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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