WordNet
tympanic cavity
n. the main cavity of the ear; between the eardrum and the inner ear [syn: middle ear, tympanum]
Wikipedia
Tympanic cavity
The tympanic cavity is a small cavity surrounding the bones of the middle ear.
Usage examples of "tympanic cavity".
The whole structure from the tympanum to this small opening, including the tympanic cavity and the ossicles, is called the middle ear.