pacemaker: Meaning and Definition of
Pronunciation: (pās'mā"kur), [key]
- an electronic device implanted beneath the skin for providing a normal heartbeat by electrical stimulation of the heart muscle, used in certain heart conditions.
- any specialized tissue that governs a rhythmic or cyclic biological activity, as the sinoatrial node of the heart that controls heartbeat.
- pacemaker (Thesaurus)