tympanum
tym·pa·num
noun
3.
a large hemispherical brass or copper percussion instrument with a drumhead that can be tuned by adjusting the tension on it
Origin
Borrowed from Latin tympanum (“a drum, timbrel, tambourine; the eardrum”). Doublet of timbre, timpani, timbal, and tymbal.
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Parts
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.