anal triangle(redirected from regio analis)
the posterior portion of the perineal region through which the anal canal opens; bounded by a line through both ischial tuberosities, the sacrotuberous ligaments, and the coccyx.
The dorsal triangular region of the perineum from the point at the tip of the coccyx to a line between the two ischial tuberosities. The anal triangle contains the anus.
See also: triangle