Perinæum, the floor of the human pelvis. The anterior portion, situated in front of the anus, is called the true perinæum, or urethral portion of the perinæum; the posterior portion is called the anal portion or ischio-rectal region.
Perinæum
Chambers's Encyclopaedia, Volume 8: Peasant to Eoumelia, p. 51
Source scan(s): p. 0060