billon

noun
bil·​lon | \ ˈbi-lən How to pronounce billon (audio) \

Definition of billon

1 : gold or silver heavily alloyed with a less valuable metal
2 : an alloy of silver containing more than 50 percent of copper by weight

First Known Use of billon

1716, in the meaning defined at sense 1

History and Etymology for billon

French, from Middle French, from bille log — more at billet

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The first known use of billon was in 1716

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