pl. -·tuses or -·tus
a ductlike passage within the body or the external opening of such a passage, as in the ear, nose, or urethra
Origin of meatusLL, avenue of sensation in the body ; from L, a passage, past participle of meare, to go, pass ; from Indo-European base an unverified form mei-, to go
nounpl. me·a·tus·es or meatus
A body opening or passage, such as the opening of the ear or the urethral canal.
Origin of meatusLatin meatus, passage, from past participle of meare, to pass; see mei-1 in Indo-European roots.
(plural meatus or meatuses)
From Latin meÄtus (“a course, passing").