释义 |
arsenic trioxide noun : a white or transparent glassy extremely poisonous compound As2O3 or As4O6 that occurs naturally as arsenolite and claudetite, that is obtained usually from the flue dusts from smelters roasting arsenic-containing ores, and that is used especially as a decolorizing agent chiefly in making insecticides, weed killers, pigments, and glass — called also arsenious oxide, white arsenic |