(rith-mis´ĭ-te) in cardiology, the ability to beat, or the state of beating, rhythmically without external stimuli. Found on http://www.encyclo.co.uk/local/21001
rhythmicity 1. The state of being rhythmical. 2. Automaticity or the capacity of a cell to initiate an impulse; such as, depolarization, without an external stimulus. Found on http://www.wordinfo.info/words/index/info/view_unit/1857/3