Tym·pan·ic a.
1. Like a tympanum or drum; acting like a drumhead; as, a tympanic membrane.
2. Anat. Of or pertaining to the tympanum.
Tympanic bone Anat., a bone of the skull which incloses a part of the tympanum and supports the tympanic membrane.
Tympanic membrane. Anat. See the Note under Ear.
tympanic bone
n : the bone enclosing the middle ear