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.
2.
The green rust formed on copper.
[Colloq.]
⇒ 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.
© Webster 1913.
Ver"di*gris, v. t.
To cover, or coat, with verdigris.
[R.] "An old
verdigrised brass bugle."
Hawthorne.
© Webster 1913.