Definitions for: Pacemaker

[n] a horse used to set the pace in racing
[n] an implanted electronic device that takes over the function of the natural cardiac pacemaker
[n] a specialized bit of heart tissue that controls the heartbeat

Synonyms: artificial pacemaker, cardiac pacemaker, pacer, pacesetter, SA node, sinoatrial node

See Also: bangtail, cardiac muscle, electronic device, heart muscle, race horse, racehorse

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