— meatal , adj.
/mee ay"teuhs/ , n. , pl. meatuses, meatus . Anat.
an opening or foramen, esp. in a bone or bony structure, as the opening of the ear or nose.
[ 1655-65; meatus course, channel, equiv. to mea ( re ) to go, extend, have a course + -tus suffix of v. action ]