PACEMAKER

• (noun) a horse used to set the pace in racing

  synonyms : pacer , pacesetter

• (noun) an implanted electronic device that takes over the function of the natural cardiac pacemaker

  synonyms : artificial pacemaker

• (noun) a specialized bit of heart tissue that controls the heartbeat

  synonyms : cardiac pacemaker , sa node , sinoatrial node

• (noun) a leading instance in its field

  "the new policy will be a pacesetter in community relations"

  synonyms : pacesetter

WordNet® 3.0, © 2006 by Princeton University.

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