'pacemaker' definitions:
Definition of 'pacemaker'
(from WordNet)
noun
A leading instance in its field; "the new policy will be a pacesetter in community relations" [syn: pacesetter, pacemaker]
noun
A specialized bit of heart tissue that controls the heartbeat [syn: pacemaker, cardiac pacemaker, sinoatrial node, SA node]
noun
An implanted electronic device that takes over the function of the natural cardiac pacemaker [syn: pacemaker, artificial pacemaker]
noun
A horse used to set the pace in racing [syn: pacer, pacemaker, pacesetter]
Definition of 'pacemaker'
From: GCIDE
- pacemaker \pacemaker\ n. (Physiol. & Anat.)
- 1. a specialized bit of heart tissue that controls the heartbeat.
- Syn: cardiac pacemaker, sinoatrial node. [WordNet 1.5]
- 2. An implanted electronic device that takes over the function of the natural cardiac pacemaker[1]; -- used to assist people whose heartbeat is irregular.
- Syn: artificial pacemaker. [WordNet 1.5]
- 3. A horse used to set the pace in racing.
- Syn: pacer, pacesetter. [WordNet 1.5]