[eer-druhm] /ˈɪərˌdrʌm/

noun, Anatomy, Zoology.
a membrane in the canal between the and the ; tympanic membrane.
the nontechnical name for tympanic membrane

1640s, from ear (n.1) + drum (n.).

eardrum ear·drum (ēr’drŭm’)
The thin, semitransparent, oval-shaped membrane that separates the middle ear from the external ear. Also called drum, drumhead, drum membrane, myringa, myrinx, tympanic membrane, tympanum.
The thin, oval-shaped membrane that separates the middle ear from the outer ear. It vibrates in response to sound waves, which are then transmitted to the ossicles of the middle ear. Also called tympanic membrane.

The membrane that divides the outer ear from the middle ear. The vibrations of this membrane in response to sound waves lead to the sensation of hearing. Also called the tympanic membrane.


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