bronze
Definition
Corrosion-resistant copper alloy containing 1 to 30 percent tin and, sometimes, small quantities of aluminum, lead, phosphorous, silicon, and/or zinc. It is more suitable for casting than copper, and is called bell metal or gun metal (used for making bearings) depending on the relative amount(s) of alloying elements.
News containing the term bronze
http://www.businessdictionary.com/definition/bronze.html

