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tympanum

tym·pa·num

UK/ˈtɪm.pən.əm/ US/ˈtɪmpʌnʌm/ uncommon archaic

noun

1.

the main cavity of the ear; between the eardrum and the inner ear

2.

the membrane in the ear that vibrates to sound

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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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.