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Medical Definition of Canalis musculotubarius
1. A canal beginning at the anterior border of the petrous portion of the temporal bone near its junction with the squamous portion, and passing to the tympanic cavity; it is divided by the cochleariform process into two semicanals: one for the auditory (eustachian) tube, the other for the tensor tympani muscle. Synonym: canalis musculotubarius. (05 Mar 2000)