a green or bluish patina formed on copper, brass, or bronze surfaces exposed to the atmosphere for long periods of time, consisting principally of basic copper sulfate.
- Also called aerugo.
- ver·di·gris·y, adjective
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How to use verdigris in a sentence
The spotted bass was taken only in tributaries of the verdigris River, where it seemed more numerous than the preceding species.Fishes of Chautauqua, Cowley and Elk Counties, Kansas | Artie L. Metcalf
When combined with copper it makes verdigris; and from this union heat alone will expel it in a concentrated state.
The solution of copper in the vegetable acid is called verdigris.
Specimens killed in alcohol are also less liable to be attacked by verdigris when pinned than those killed by some other method.Directions for Collecting and Preserving Insects | C. V. Riley
To his disappointment he found most of the rifles in unserviceable condition, covered with rust and verdigris.The Doomsman | Van Tassel Sutphen
British Dictionary definitions for verdigris
a green or bluish patina formed on copper, brass, or bronze and consisting of a basic salt of copper containing both copper oxide and a copper salt
a green or blue crystalline substance obtained by the action of acetic acid on copper and used as a fungicide and pigment; basic copper acetate
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012