trimetallic

[ trahy-muh-tal-ik ]

adjective

1. of three metals.
2. Engraving. (of an offset plate) consisting of a face layer of chromium, stainless steel, or chemically prepared aluminum over a layer of copper with a strengthening backup layer of steel or other metal.

Word History and Origins

Origin of trimetallic¹

First recorded in 1885–90; tri- + metallic