boric acid

(noun) a white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative. Synonyms: boric acid, orthoboric acid.

(noun) any of various acids containing boron and oxygen. Synonyms: boric acid, boracic acid.