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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