siphonium
Si*pho"ni*um, n.; pl. Siphonia. Etym: [NL., from Gr. Siphon.] (Anat.) Defn: A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.
Si*pho"ni*um, n.; pl. Siphonia. Etym: [NL., from Gr. Siphon.] (Anat.) Defn: A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.