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1. Oxford American Dictionary

   pacemaker

   • IPA[ˈpāsˌmākər]

   美式

   • n.
     an artificial device for stimulating the heart muscle and regulating its contractions.；the part of the heart muscle (the sinoatrial node) that normally performs this role.

   • noun: pacemaker, plural noun: pacemakers

2. • 釋義

   n.

   名詞

   • 1. an artificial device for stimulating the heart muscle and regulating its contractions.
   • ▪ the part of the heart muscle (the sinoatrial node) that normally performs this role.
   • ▪ the part of an organ or of the body that controls any other rhythmic physiological activity.
   • 2. another term for pacesetter