guard cell definition, meaning - what is guard cell in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “guard cell”

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guard cell

noun [C] uk   us   specialized
on a leaf, one of a pair of cells positioned around each stoma (= a small hole in the surface) that open it to release gases or close it to prevent water from being lost
(Definition of guard cell from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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