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pacemaker |
1 definition found From WordNet r 1.6 [wn]: pacemaker n 1: a specialized bit of heart tissue that controls the heartbeat [syn: {cardiac pacemaker}, {sinoatrial node}, {SA node}] 2: an implanted electronic device that takes over the function of the natural cardiac pacemaker [syn: {artificial pacemaker}] 3: a horse used to set the pace in racing [syn: {pacer}, {pacesetter}]
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