verdigris Meaning, Definition & Usage

  1. noun a blue or green powder used as a paint pigment
    cupric acetate.
  2. noun a green patina that forms on copper or brass or bronze that has been exposed to the air or water for long periods of time
  3. verb color verdigris

WordNet

Ver"di*gris noun
Etymology
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.
Definitions
  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.
Ver"di*gris transitive verb
Definitions
  1. To cover, or coat, with verdigris. R. "An old verdigrised brass bugle." Hawthorne.

Webster 1913