an alloy used in some coins, consisting of gold or silver with a heavy proportion of another metal, as copper
Origin of billonFrench ; from Old French bille, small log: see billet
- An alloy of gold or silver with a greater proportion of another metal, such as copper, used in making coins.
- An alloy of silver with a high percentage of copper, used in making medals and tokens.
Origin of billonFrench, from Old French, ingot, from bille, log; see billet2.
NounSee also: billón