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pacemaker

1 ENTRIES FOUND:
pacemaker /ˈpeɪsˌmeɪkɚ/ noun
plural pacemakers
pacemaker
/ˈpeɪsˌmeɪkɚ/
noun
plural pacemakers
Britannica Dictionary definition of PACEMAKER
[count]
1 
medical : a small electrical machine put inside a person to make the heart beat evenly
2 
British : pacesetter