What does "arsenous oxide" mean?

a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer

What is a synonym for "arsenous oxide"?

Common synonyms include: arsenic, arsenic trioxide, arsenous anhydride, ratsbane, white arsenic.

Rare ·Advanced level

Noun

1
a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer wordnet