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English definition of “semilunar valve”

semilunar valve

noun [C]     /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 heartThe circulatory system and blood
(Definition of semilunar valve noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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