Category:Verdigris

Ver"di*gris, n. Etym: [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.)

Defn: 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.

2. The green rust formed on copper. [colloq.]

Note: this rust is a carbonate of copper, and should not be Confounded with true verdigris. U. S. Disp. Blue verdigris (chem.), a Verdigris having a blue color, used 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.

Verdigris Ver"di*gris, v. t.

Defn: to cover, or coat, with verdigris. [r.] "an old verdigrised Brass bugle." Hawthorne.