boric acid
noun
Meaning
- H3BO3; B(OH)3; a white crystalline solid, soluble in hot water to form a weak acid. Used as a mild antiseptic, flame retardant, insecticide and in the manufacture of borax and other borate salts.
- A hydrate of boric oxide, specifically any of the three acids orthoboric acid, metaboric acid or pyroboric acid.