Tympanum
In anatomy, the drum of the ear, the eardrum, the tympanic membrane.
The tympanum resembles the head of a tiny drum.
It separates the middle ear from the external ear.
<U>Etymology:</U> The Latin term 'tympanum auris' was introduced by Albertus Magnus circa 1225. A tympanum was a drum or similar instrument, as a tambourine or timbrel; also, the stretched membrane of a drum, a drum-head.