Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The anterior or oral portion of the alimentary canal of an embryo.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A depression on the ectoderm of a developing embryo that becomes the mouth

Etymologies

New Latin : Greek stoma, mouth + Greek hodaios, on the way (from hodos, road).
(American Heritage® Dictionary of the English Language, Fourth Edition)
Ancient Greek στόμα ("mouth") + εἶδος ("likeness") + -um (Wiktionary)

Examples

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