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siphonium

noun
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si·​pho·​ni·​um | \ sīˈfōnēəm \
plural siphonia\ -​ēə \

Definition of siphonium

: a bony tube in some birds connecting the tympanum with the air chambers of the articular piece of the mandible

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History and Etymology for siphonium

New Latin, from Greek siphōnion, diminutive of siphōn tube, siphon

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“Siphonium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/siphonium. Accessed 2 Mar. 2021.

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