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