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verdigris

verdigris (vûr´dəgrēs´), one of three copper acetates: blue verdigris, Cu(CH3COO)2·CuO·6H2O; green verdigris, 2Cu(CH3COO)2·CuO·6H2O; or neutral verdigris, Cu(CH3COO)2·H2O; or a mixture of them. It is a poisonous gray-green to green-blue substance that is formed by the action of acetic acid on copper or copper oxide, e.g., verdigris can form on copper pots used to cook acidic foods such as tomatoes. Verdigris is used as a mordant in dyeing, as a pigment, and in making Paris green. Verdigris may also be used to mean patina.

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"verdigris." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 22 May. 2017 <http://www.encyclopedia.com>.

"verdigris." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (May 22, 2017). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/verdigris

"verdigris." The Columbia Encyclopedia, 6th ed.. . Retrieved May 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/verdigris

verdigris

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.

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"verdigris." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 22 May. 2017 <http://www.encyclopedia.com>.

"verdigris." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. (May 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris-0

"verdigris." The Oxford Pocket Dictionary of Current English. . Retrieved May 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris-0

verdigris

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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"verdigris." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. 22 May. 2017 <http://www.encyclopedia.com>.

"verdigris." The Concise Oxford Dictionary of English Etymology. . Encyclopedia.com. (May 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris-1

"verdigris." The Concise Oxford Dictionary of English Etymology. . Retrieved May 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris-1

verdigris

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"verdigris." Oxford Dictionary of Rhymes. . Encyclopedia.com. 22 May. 2017 <http://www.encyclopedia.com>.

"verdigris." Oxford Dictionary of Rhymes. . Encyclopedia.com. (May 22, 2017). http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris

"verdigris." Oxford Dictionary of Rhymes. . Retrieved May 22, 2017 from Encyclopedia.com: http://www.encyclopedia.com/humanities/dictionaries-thesauruses-pictures-and-press-releases/verdigris