arsenic
Nouns
- (n) a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer arsenic trioxide, arsenous anhydride, arsenous oxide, ratsbane, white arsenic,
- (n) a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar As, atomic number 33,