Verdigris /(?)/

Ver·di·gris

Verdigris

n.
  1. 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. (Chem.)
  2. The green rust formed on copper. [Colloq.]

Phrases & Compounds
Blue verdigris
a verdigris having a blue color, used as a pigment, etc.
Distilled verdigris
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

v. t.
  1. To cover, or coat, with verdigris. [R.]