- (chemistry) 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.
- (chemistry) A hydrate of boric oxide, specifically any of the three acids orthoboric acid, metaboric acid, or pyroboric acid.
- (White crystalline solid soluble as a weak acid): Acidum Boricum
- boracic acid
- E284 (when used as a preservative)
- orthoboric acid
White crystalline solid soluble as a weak acid