Si*pho"ni*um\, n.; pl. Siphonia. [NL., from Gr. ????, dim. of ????. See Siphon.] (Anat.) A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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