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billon

[ bil-uhn ]
/ ˈbɪl ən /
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noun
an alloy used in coinage, consisting of gold or silver with a larger amount of base metal.
an alloy of silver with copper or the like, used for coins of small denomination.
any coin struck from such an alloy.
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Origin of billon

1720–30; <French: debased metal, originally ingot, equivalent to Middle French bille log (see billet2) + -on noun suffix
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British Dictionary definitions for billon

billon
/ (ˈbɪlən) /

noun
an alloy consisting of gold or silver and a base metal, usually copper, used esp for coinage
any coin made of such an alloy

Word Origin for billon

C18: from Old French: ingot, from bille log; see billet ²
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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