Added 10 October 2026 timpanum noun Categories: Obscure Words noun ! Definition from Wiktionary (CC BY-SA). More about timpanum at Wordnik → Where our words come from → The eardrum. The middle ear. The diaphragm of a telephone. Related Words: tympanumtympanectotympanictympanicumpromontoryhypotympanumepitympanumtympanaltubotympanummesotympanum Back to today's word