meaning of verdigris
1. 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.
2. The green rust formed on copper.
3. To cover, or coat, with verdigris.
4. a green patina that forms on copper or brass or bronze that has been exposed to the air or water for long periods of time
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