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   pacemaker

   /ˈpeɪsˌmeɪkə/

   noun

   • 1. a person or animal who sets the pace at the beginning of a race, sometimes in order to help a runner break a record: "he acted as a pacemaker for Bannister when he broke the four-minute mile"
   • ▪ a person who sets standards of achievement for others: "unbeaten Rangers are the surprise pacemakers"
   • 2. a device for stimulating the heart muscle and regulating its contractions.
   • ▪ the part of the heart muscle (the sino-atrial node) which normally regulates contractions.
   • ▪ the part of an organ or of the body which controls rhythmic physiological activity: "the brain's circadian pacemaker which regulates our ‘biological clock’"

   Derivatives

   • 1. pacemaking adjective

   Scrabble Points: 19

   • P

     3

   • A

     1

   • C

     3

   • E

     1

   • M

     3

   • A

     1

   • K

     5

   • E

     1

   • R

     1

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