https://en.wikipedia.org/wiki/Meatus
In anatomy, a meatus (/ m iː ˈ eɪ t ə s /, mee-AY-təs), plural "meatus" or "meatuses", is a natural body opening or canal.. Meatus may refer to: . the external acoustic meatus, the opening of the ear canal; The internal auditory meatus, a canal in the temporal bone of the skull; the urinary meatus, which is the opening of the urethra, situated on the glans penis in males, and in the …