perineum

noun

Etymology: Borrowed from Late Latin perinaeum, from Ancient Greek περίναιον (perínaion, “space between the anus and scrotum”), from Ancient Greek περίνεος, περίνεοι (períneos, períneoi, “male genitals”), itself from earlier Ancient Greek περίς (perís, “penis”) through influence from Ancient Greek πηρίς (pērís, “scrotum”).

1. The region between the genitalia and anus.

   “He was attacked with complete retention of urine, after a debauch, and six weeks afterwards an abscess formed in the perineum, which eventually burst, leaving a fistulous opening, through which the urine continued to be discharged to the period of his admission into the Hospital.”

   “The prostate is surrounded by venous plexi and the perineum has a rich blood supply.”