a. [ Pref. post- + tympanic. ] (Anat.) Situated behind the tympanum, or in the skull, behind the auditory meatus. [ 1913 Webster ]
n. (Anat.) The tympanic bone. [ 1913 Webster ]
a. [ See Tympanum. ]
Tympanic bone (Anat.),
Tympanic membrane. (Anat.)