The Collaborative International Dictionary
Meatuses
Meatus \Me*a"tus\, n. sing. & pl.; E. pl. Meatuses. [L., a going, passage, fr. meare to go.] (Anat.) A natural passage or canal; as, the external auditory meatus. See Illust. of Ear.
Wiktionary
meatuses
n. (plural of meatus English)