pacemaker
US /ˈpeɪsˌmeɪ.kɚ/
UK /ˈpeɪsˌmeɪ.kɚ/
1.
an artificial device for stimulating the heart muscle and regulating its contractions
:
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The patient had a pacemaker implanted to regulate his heartbeat.
•
Modern pacemakers are very small and efficient.
2.
a person or animal that sets the pace in a race or competition
:
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The rabbit was the pacemaker for the first half of the race.
•
She acted as a pacemaker for her friend in the marathon.