Definition of tympanic membrane
: a thin membrane that closes externally the cavity of the middle ear and functions in the mechanical reception of sound waves and in their transmission to the site of sensory reception —called also eardrum — see ear illustration
First Known Use of tympanic membrane
Medical Definition of tympanic membrane
: a thin membrane separating the middle ear from the inner part of the external auditory canal that vibrates in response to sound energy and transmits the resulting mechanical vibrations to the structures of the middle ear—called also eardrum, tympanum
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