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Webster 1913 Edition

Verdigris

Ver′di-gris

,
Noun.
[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 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.

Ver′di-gris

,
Verb.
T.
To cover, or coat, with verdigris.
[R.]
“An old verdigrised brass bugle.”
Hawthorne.

Webster 1828 Edition

Verdigris

VER'DIGRIS

,
Noun.
Rust of copper, or an acetate of copper, formed by the combination of an acid with copper.

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