CODPIECE
codpiece
(noun) (15th-16th century) a flap for the crotch of men’s tight-fitting breeches
Source: WordNet® 3.1
Etymology
Noun
codpiece (plural codpieces)
A part of male dress in the 15th and 16th centuries, worn in front of the breeches to cover the male genitals.
A conspicuous protection for the male genitals in a suit of plate armor.
Source: Wiktionary
Cod"piece`, n. Etym: [Cod, n., piece.]
Definition: A part of male dress in front of the breeches, formerly made
very conspicuous. Shak. Fosbroke.
Source: Webster’s Unabridged Dictionary 1913 Edition