- a white or yellowish-white poisonous solid, BaO, highly reactive with water: used chiefly as a dehydrating agent and in the manufacture of glass.
- the hydroxide, hydrated form of this compound, Ba(OH)2⋅8H2O, used chiefly in the industrial preparation of beet sugar and for refining animal and vegetable oils.
- another name for barium oxide, barium hydroxide
