Ver"di*gris, v. t. To cover, or coat,
with verdigris. [R.] "An old verdigrised brass bugle."
Hawthorne.
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.