Synonyms of PACEMAKER

noun

1. a leading instance in its field

   • PACESETTER14

2. a specialized bit of heart tissue that controls the heartbeat

   Also: cardiac pacemaker, sinoatrial node, sa node.

3. an implanted electronic device that takes over the function of the natural cardiac pacemaker

   Also: artificial pacemaker.

4. a horse used to set the pace in racing

   • PACER9
   • PACESETTER14