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siphonium

noun si·pho·ni·um \ sīˈfōnēəm \
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Definition of siphonium

plural siphonia \-ēə\
: a bony tube in some birds connecting the tympanum with the air chambers of the articular piece of the mandible

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Origin and Etymology of siphonium

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

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