tympanum

noun

1.
the main cavity of the ear; between the eardrum and the inner ear
middle ear tympanic cavity
2.
the membrane in the ear that vibrates to sound
timpan eardrum myringa tympanic membrane
3.
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it
kettle kettledrum timpani tympani
Derived from:
timpanist tympanist