|dīə|zōik- noun
Etymology: International Scientific Vocabulary diaz- + -ic
: any of a class of acids containing a diazo group united with hydroxyl ; especially : an aromatic acid of the general formula ArN = NOH (as benzene-diazoic acid C 6 H 5 N . NOH) obtained in the form of salts by treating a diazonium chloride with alkali