Word:   
Definitions of pacemaker:
  • noun:   an implanted electronic device that takes over the function of the natural cardiac pacemaker
  • noun:   a specialized bit of heart tissue that controls the heartbeat
  • noun:   a horse used to set the pace in racing
  • noun:   a leading instance in its field

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Search for pacemaker at other dictionaries: OneLook, Oxford, American Heritage, Merriam-Webster, Wikipedia

See pacemaker used in context: 5 poetry verses, 1 definition

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