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pacemaker

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{n: pacemaker, artificial pacemaker} an implanted electronic device that takes over the function of the natural cardiac pacemaker



{n: pacemaker, cardiac pacemaker, sinoatrial node, SA node} a specialized bit of heart tissue that controls the heartbeat

{n: pacer, pacemaker, pacesetter} a horse used to set the pace in racing

{n: pacesetter, pacemaker} a leading instance in its field
"the new policy will be a pacesetter in community relations"


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