Main Entry: pace·mak·er

Pronunciation: \ˈpās-ˌmā-kər\

Function: noun

Date: 1884

1 a : one that sets the pace for another b : one that takes the lead or sets an example
2 a : a group of cells or a body part (as the sinus node of the heart) that serves to establish and maintain a rhythmic activity b : an electrical device for stimulating or steadying the heartbeat or reestablishing the rhythm of an arrested heart

— pace·mak·ing \-kiŋ\ noun