extrasystole extrasyphilitic • extrasystolic · · · Info · Definitions · Characters · · extrasystole · · Text Latin · · Script 12 · · Length 5 · · Syllables Definitions · · · (noun) a premature systole resulting in a momentary cardiac arrhythmia. · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 l latin small letter l U+006C o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 x latin small letter x U+0078 y latin small letter y U+0079