trimetallic
Americanadjective
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of three metals.
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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.
Etymology
Origin of trimetallic
Example Sentences
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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 Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 4 "Cincinnatus" to "Cleruchy" by Various
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