arsenic trioxide

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a white powdered poisonous trioxide of arsenic;
used in manufacturing glass and as a pesticide (rat poison) and weed killer
• Syn:
arsenic, arsenous anhydride, arsenous oxide, white arsenic, ratsbane
• Derivationally related forms:
arsenical (for: arsenic)
• Hypernyms:
trioxide