"arrhythmic" in the adjective sense
1. arrhythmic, jerking, jerky
lacking a steady rhythm
"an arrhythmic heartbeat"
2. arrhythmic, arrhythmical
without regard for rhythm
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License