noun Chemistry. 1.Also called calcined baryta, barium oxide, barium monoxide, barium protoxide. a white or yellowish-white poisonous solid, BaO, highly reactive with water: used chiefly as a dehydrating agent and in the manufacture of glass.
2.Also called caustic baryta, barium hydroxide, barium hydrate. the hydroxide, hydrated form of this compound, Ba(OH)
2 ⋅8H
2 O, used chiefly in the industrial preparation of beet sugar and for refining animal and vegetable oils.
Origin: 1800–10; <
Neo-Latin, equivalent to
bary- (<
Greek barýs heavy) +
-ta (<
Greek -(
i)
tēs -ite1)
Related forms