Paris green

noun

1. Chemistry.,  an emerald-green, poisonous, water-insoluble powder produced from arsenic trioxide and copper acetate: used chiefly as a pigment, insecticide, and wood preservative.

2. (sometimes lowercase),  a variable hue ranging from light to vivid yellow green in color.

Paris green

noun

1. an emerald-green poisonous insoluble substance used as a pigment and insecticide. It is a double salt of copper arsenite and copper acetate. Formula: 3Cu(AsO 2 ) 2 .Cu(C 2 H 3 O 2 ) 2

Word History and Origins

Origin of Paris green¹

First recorded in 1870–75