arsenic trioxide
Noun
Meaning
a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
Source: WordNetSynonyms
arsenic
ratsbane
white arsenic
arsenous anhydride
arsenous oxide
poison
trioxide
AS
arsenious acid
arsenolite
arsenious oxide
arsenic white
arsenic sesquioxide
arsenous trioxide