a leading instance in its field; the new policy will be a pacesetter in community relations

[ Syn: pacesetter ]

a specialized bit of heart tissue that controls the heartbeat

[ Syn: cardiac pacemaker , sinoatrial node , sa node ]

an implanted electronic device that takes over the function of the natural cardiac pacemaker

[ Syn: artificial pacemaker ]

a horse used to set the pace in racing

[ Syn: pacer , pacesetter ]