| 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 n. A poisonous emerald-green powder, C4H6As6Cu4O16, used as a pigment, insecticide, and wood preservative. |