velardi

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 ]

☞ 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 ]

v. t. To cover, or coat, with verdigris. [ R. ] “An old verdigrised brass bugle.” Hawthorne. [ 1913 Webster ]

n. [ Cf. Sp. verdino bright green, F. verdin the yellow-hammer. ] (Zool.) A small yellow-headed bird (Auriparus flaviceps) of Lower California, allied to the titmice; -- called also goldtit. [ 1913 Webster ]

n. [ F. verd, vert, green. ] (Chem.) A commercial name for a green aniline dye. [ 1913 Webster ]

n. See Farthingale. [ Spelled also verdingall. ] [ Obs. ] [ 1913 Webster ]

n. Verdict. [ Obs. ] Chaucer. [ 1913 Webster ]

n. [ F. vert-de-terre, literally, green of earth. ] (Chem.) (a) Verdigris. [ Obs. ] (b) Either one of two pigments (called blue verditer, and green verditer) which are made by treating copper nitrate with calcium carbonate (in the form of lime, whiting, chalk, etc.) They consist of hydrated copper carbonates analogous to the minerals azurite and malachite. [ 1913 Webster ]

Verditer blue, a pale greenish blue color, like that of the pigment verditer. [ 1913 Webster ]