Dictionary
ver•di•gris
Pronunciation: (vûr'di-grēs", -gris), [key]—
n.
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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.