trimetallic

American  

[trahy-muh-tal-ik] / ˌtraɪ məˈtæl ɪk /

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.

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Etymology

Origin of trimetallic

First recorded in 1885–90; tri- + metallic

Example Sentences

Citric acid, being tribasic, forms either acid monometallic, acid dimetallic or neutral trimetallic salts; thus, mono-, di- and tri-potassium and sodium citrates are known.

From Project Gutenberg