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English definition of “eardrum”

eardrum

noun [C] uk   /ˈɪə.drʌm/ us    /ˈɪr-/
a thin piece of skin inside the ear that moves backwards and forwards very quickly when sound waves reach it, allowing you to hear soundsThe ear
(Definition of eardrum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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