PACEMAKER

pacer, pacemaker, pacesetter

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

pacemaker, artificial pacemaker

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

pacemaker, cardiac pacemaker, sinoatrial node, SA node

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

pacesetter, pacemaker

(noun) a leading instance in its field; “the new policy will be a pacesetter in community relations”

Source: WordNet® 3.1

Etymology

Noun

pacemaker (plural pacemakers)

One who sets the pace in a race, to guide the others.

(anatomy) A set of nerves which stimulate the heart to beat.

(hence, medicine) A medical implement that is used to stimulate a heart to beat by simulating the action of the natural pacemaker.

Source: Wiktionary

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