Meatus

·noun ·sg & ·pl A natural passage or canal; as, the external auditory meatus. ·see ·Illust. of Ear.

meatus
mĕātus, ūs, m. [meo], a going, passing, motion, course (poet. and post-Aug.). I Lit.: solis lunaeq...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
meatus
meātus ūs, m meo, a going, passing, motion, course : caeli, V.— A way, path, passage : Danuvius do...

An Elementary Latin Dictionary