white arsenic

Từ điển Oxford Learners Wordfinder Dictionary

noun

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