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English definition of “semilunar valve”

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semilunar valve

noun [C] uk   /ˌsem.i.luː.nəˈvælv/ us    /-nɚˈ-/ specialized
one of the valves (= structures that open and close) that stop blood from returning into the ventricles (= lower spaces) of the heart
(Definition of semilunar valve from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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