trioxide : Idioms & Phrases

Index

arsenic trioxide

  • noun a white powdered poisonous trioxide of arsenic; used in manufacturing glass and as a pesticide (rat poison) and weed killer
    arsenous oxide; arsenous anhydride; white arsenic; arsenic; ratsbane.
WordNet

Sulphur trioxide

  • (Chem.), a white crystalline solid, SO3, obtained by oxidation of sulphur dioxide. It dissolves in water with a hissing noise and the production of heat, forming sulphuric acid, and is employed as a dehydrating agent. Called also sulphuric anhydride, and formerly sulphuric acid.
Webster 1913