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Origin and history of stoma
stoma(n.)
"orifice, small opening in an animal body," 1680s, in zoology, Modern Latin, from Greek stoma (plural stomata, genitive stomatos) "mouth; mouthpiece; talk, voice; mouth of a river; any outlet or inlet."
This is reconstructed to be from PIE root *stom-en-, denoting various body parts and orifices (source also of Avestan staman- "mouth" (of a dog), Hittite shtamar "mouth," Middle Breton staffn "mouth, jawbone," Cornish stefenic "palate").
In botany, in reference to small slits in leaves, etc., by 1837. The surgical sense is attested by 1937. Related: Stomal.
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