noun see: billet Date: circa 1727 gold or silver heavily alloyed with a less valuable metal, an alloy of silver containing more than 50 percent of copper by weight
BILLON
Meaning of BILLON in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012