- the area in front of the anus extending to the fourchette of the vulva in the female and to the scrotum in the male.
- the diamond-shaped area corresponding to the outlet of the pelvis, containing the anus and vulva or the roots of the penis.
- the region of the body between the anus and the genital organs, including some of the underlying structures
- the nearly diamond-shaped surface of the human trunk between the thighs
