tonocard tonnishness • tonoclonic · · · Info · Definitions · Synonyms · Characters · · tonocard · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) antiarrhythmic drug (trade name Tonocard) used to treat ventricular arrhythmias when less dangerous drugs have failed. Synonyms: tocainide, Tonocard. · · Noun Definition 1 Synonyms · · · tocainide · · Synonym 1 Characters · · a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074