FULMINIC ACID Meaning of FULMINIC ACID in English [ fʌl'mɪnɪk , fʊl- ]■ noun Chemistry a very unstable acid isomeric with cyanic acid.OriginC19: fulminic from L. fulmen , fulmin- 'lightning' + -ic . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004