Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
A poisonous, hygroscopic, white, translucent crystalline compound, H3AsO4, occurring chiefly in its hemihydrate form, used to manufacture arsenates and glass, and in treating wood.
(Elements & Compounds) a white poisonous soluble crystalline solid used in the manufacture of arsenates and insecticides. Formula: H3AsO4
a white, crystalline, water-soluble powder, H3AsO4∙½H2O, used esp. in the manufacture of arsenates.