1. a blue-green substance that forms on copper, brass, or bronze when exposed to air and moisture over time

Examples

• The old copper roof was covered with a layer of verdigris.
• The statue’s verdigris gave it an antique appearance.
• She cleaned the verdigris off the brass doorknob.
• The green verdigris on the penny showed its age.
• Artists sometimes use verdigris as a pigment in paintings.
• The ship’s bronze propeller developed verdigris after years underwater.