codpiece

English Thesaurus

1. (15th-16th century) a flap for the crotch of men's tight-fitting breeches (noun.artifact)

hypernym	:	flap,
definition	:	any broad thin and limber covering attached at one edge; hangs loose or projects freely (noun.artifact)

part meronym	:	breeches, knee breeches, knee pants, knickerbockers, knickers,
definition	:	trousers ending above the knee (noun.artifact)