ear·drum 
(îrdrŭm′)
(îrdrŭm′)n.
The thin, semitransparent, oval-shaped membrane that separates the middle ear from the external ear. Also called tympanic membrane, tympanum.
- disallowable
- disallowance
- disambiguate
- disambiguation
- disannul
- disannulment
- disappear
- disappearance
- disappoint
- disappointed
- disappointedly
- disappointing
- disappointingly
- disappointment
- disapprobation
- disapproval
- disapprove
- disapprover
- disapprovingly
- disarm
- disarmament
- disarmer
- disarming
- disarmingly
- disarrange