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English definition of “stoma”

stoma

noun [C] uk   /ˈstəʊ.mə/ us    /ˈstoʊ-/ (plural stomata) specialized
one of the many pores (= very small holes in the surface) on a leaf or stem of a plant through which gases are able to pass in and out
(Definition of stoma from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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