hydrocyanic acid hydrocyanic • hydrocyanide · · · Info · Definitions · Synonyms · Characters · · hydrocyanic acid · · Text Common · · Latin · · Scripts 16 · · Length 7 · · Syllables Definitions · · · (noun) a solution of hydrogen cyanide in water; weak solutions are used in fumigating and in the synthesis of organic compounds. Synonyms: hydrocyanic acid, prussic acid. · · Noun Definition 1 Synonyms · · · prussic acid · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 h latin small letter h U+0068 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 y latin small letter y U+0079