Definitions
Century Dictionary and Cyclopedia
- n. In ornithology, the atmosteon or air-bone which conveys air from the tympanic cavity to the pneumatic cavity of the mandible.
Wiktionary
- n. anatomy A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.
GNU Webster's 1913
- n. (Anat.) A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible.
Etymologies
- See siphon. (Wiktionary)
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