Siphonium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Siphonium \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.
     [1913 Webster]