|(Chem.)||an organic, imide acid, obtained as a colorless crystalline substance, C12H4N2O8 by heating an ammonium salt of mellitic acid. By reduction it is changed to a dark blue substance (euchrone), - hence its name.|
See also: Euchroic
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.