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Par·is green(par'is grēn),
Cupric acetoarsenite, used as an insecticide and as a pigment.
A poisonous emerald-green powder, C4H6As6Cu4O16, used as a pigment, insecticide, and wood preservative.
an oldfashioned green pigment used in plaster and still found in old buildings. Can cause inorganic arsenic poisoning.