VERDIGRIS
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Ver"di*gris (?), n. [F. vert-de-gris, apparently from verd, vert, green + de of + gris gray, but really a corruption of LL. viride aeris (equivalent to L. aerugo), from L. viridis green + aes, aeris, brass. See Verdant, and 2d Ore.] 1. (Chem.) A green poisonous substance used as a pigment and drug, obtained by the action of acetic acid on copper, and consisting essentially of a complex mixture of several basic copper acetates.
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2. The green rust formed on copper. [Colloq.]
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&hand_; This rust is a carbonate of copper, and should not be confounded with true verdigris. U. S. Disp.
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Blue verdigris (Chem.), a verdigris having a blue color, used as a pigment, etc. -- Distilled verdigris (Old Chem.), an acid copper acetate; -- so called because the acetic acid used in making it was obtained from distilled vinegar. -- Verdigris green, clear bluish green, the color of verdigris.
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Ver"di*gris, v. t. To cover, or coat, with verdigris. [R.] “An old verdigrised brass bugle.” Hawthorne.
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