PACEMAKER

/ˈpeɪsˌmeɪkəɹ/ ► audio Scrabble 19 Words With Friends 22

Scrabble letter values: P₃A₁C₃E₁M₃A₁K₅E₁R₁ = 19

Definition

noun a leading instance in its field. — synonyms: pacesetter
noun a specialized bit of heart tissue that controls the heartbeat. — synonyms: cardiac_pacemaker, sinoatrial_node, SA_node
noun an implanted electronic device that takes over the function of the natural cardiac pacemaker. — synonyms: artificial_pacemaker
noun a horse used to set the pace in racing. — synonyms: pacer, pacesetter