%siphonium%

‖n.; pl. Siphonia [ NL., from Gr. &unr_;&unr_;&unr_;&unr_;, dim. of &unr_;&unr_;&unr_;&unr_;. See Siphon. ] (Anat.) A bony tube which, in some birds, connects the tympanium with the air chambers of the articular piece of the mandible. [ 1913 Webster ]