VERDIGREASE, a kind of rust of copper, much used by painters as a green colour.
Verdigrease is properly no other than copper dissolved by a mild acid into the form of an ærugo, or rust.
This rust of copper is rarely used internally; nor ought it, unless in the most desperate case, where instantaneous vomiting is necessary. Externally it is much used as a detergent or defecative: it eats off fungous flesh in ulcers, and, mixed with honey, is used in aphthæ and ulcerations of the mouth.