meatus(n = noun.body) - a natural body passageway;
is a kind of passage, passageway
has particulars: acoustic meatus, auditory canal, auditory meatus, ear canal, external auditory canal, nasal meatus
A natural passage or canal; as, the external auditory meatus. See Illust. of Ear. [1913 Webster]
meatus, n. (pl. same or meatuses) Anat. a channel or passage in the body or its opening.
Etymology:
L, = passage f. meare flow, run