verdigris

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ver·di·gris / ˈvərdəˌgrēs; -ˌgris; -ˌgrē/ • n. a bright bluish-green encrustation or patina formed on copper or brass by atmospheric oxidation, consisting of basic copper carbonate.

verdigris

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verdigris green rust of copper. XIV. ME. verdegres, vertegres — OF. vertegrez, earlier vert de Grece (mod. vert-de-gris) ‘green of Greece’. The reason for the name is unkn.

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