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English definition of “tympanum”

tympanum

noun [C] uk   /ˈtɪm.pə.nəm/ ( plural tympana /ˈtɪm.pə.nə/ or tympanums) specialized us  
an eardrum (= a thin piece of skin inside the ear that moves backwards and forwards when sound waves reach it, allowing you to hear sounds)
(Definition of tympanum from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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