in sense 1, from Middle English, from Old English timpana, from Latin tympanum; in other senses, from Medieval Latin & Latin tympanum
before the 12th century, in the meaning defined at sense 1
“Tympan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tympan. Accessed 27 Nov. 2022.
Britannica.com: Encyclopedia article about tympan
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