pacemaker Meaning, Definition & Usage

  1. noun a leading instance in its field
    pacesetter.
    • the new policy will be a pacesetter in community relations
  2. noun a specialized bit of heart tissue that controls the heartbeat
    cardiac pacemaker; SA node; sinoatrial node.
  3. noun an implanted electronic device that takes over the function of the natural cardiac pacemaker
    artificial pacemaker.
  4. noun a horse used to set the pace in racing
    pacer; pacesetter.

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