Definition of stoma noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈstəʊ//
    ; NAmE NAmE//ˈstoʊ//
    (pl. stomas, stomata
    BrE BrE//ˈstəʊmətə//
    ; NAmE NAmE//ˈstoʊmətə//
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  1. 1 (biology) a tiny pore (= hole) in the outer layer of a plant’s leaf or stem
  2. 2 (biology) a small opening like a mouth, in some animals
  3. 3(medical) an artificial opening made in an organ of the body, especially in the colon or trachea
  4. Word Originlate 17th cent.: modern Latin, from Greek stoma ‘mouth’.
See the Oxford Advanced American Dictionary entry: stoma