Bimetallism is an economics term. It refers to a basis for currency valuation that centers on the two metals, silver and gold. In bimetallism, a given weight ("x" ounces) of one metal is equal in value to a given weight ("y" ounces) of the other metal. As an example, in the 19th century, the Populist party supported a policy of bimetallism in which 16 oz. of silver had the equivalent worth of 1 oz. of gold. A link can be found below.