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 example2 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