perineum

per·i·ne·um

noun \ˌper-ə-ˈnē-əm\

plural -nea \-ˈnē-ə\

Definition of PERINEUM

: an area of tissue that marks externally the approximate boundary of the outlet of the pelvis and gives passage to the urinogenital ducts and rectum; also : the area between the anus and the posterior part of the external genitalia

— per·i·ne·al \-ˈnē-əl\ adjective

Origin of PERINEUM

Middle English, from Late Latin perinaion, from Greek, from peri- + inan to empty out; perhaps akin to Sanskrit iṣṇāti he sets in motion

First Known Use: 15th century