- 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.
Origin of verdigris
Examples from the Web for verdigris
It was in the narrow stretch where the Verdigris come close to the Arkansas.Slave Narratives, Oklahoma
Verdigris is an acetate of copper, or a mixture of acetates.Poisons: Their Effects and Detection
Alexander Wynter Blyth
The principal exports must be gunny bags, verdigris, and iron rust.Excursions and Poems
Henry David Thoreau
Arsenic and verdigris are sometimes used, but it does not answer.Serge Panine, Complete
The manufacture of verdigris at Montpellier is altogether domestic.
- 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
Word Origin and History for verdigris
c.1300, from Old French verte grez (13c.), verte de Grece (late 12c.), literally "green of Greece," from obsolete French verd, from Latin viridis (see verdure). The reason for it being called that is not known. In chemistry, confined to a basic copper acetate; popularly applied to the green encrustation on copper or brass exposed to the air.