verdigris

3 definitions found

verdigris - Collaborative International Dictionary of English v.0.48 :

  Verdigris \Ver"di*gris\, v. t.
     To cover, or coat, with verdigris. [R.] "An old verdigrised
     brass bugle." --Hawthorne.
     [1913 Webster]

  Verdigris \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.
        [1913 Webster]
  
     2. The green rust formed on copper. [Colloq.]
        [1913 Webster]
  
     Note: This rust is a carbonate of copper, and should not be
           confounded with true verdigris. --U. S. Disp.
           [1913 Webster]
  
     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.
        [1913 Webster]

verdigris - WordNet (r) 2.1 (2005) :

  verdigris
      n 1: a blue or green powder used as a paint pigment [syn:
           verdigris, cupric acetate]
      2: 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
      v 1: color verdigris