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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.
Farlex Partner Medical Dictionary © Farlex 2012
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
Medical Dictionary, © 2009 Farlex and Partners