ischiocavernosus

noun

is·​chio·​cav·​er·​no·​sus -ˌkav-ər-ˈnō-səs 

plural ischiocavernosi -ˌsī 

: a muscle on each side that arises from the ischium near the crus of the penis or clitoris and is inserted on the crus near the pubic symphysis