pacemaker

Từ điển WordNet v3.1 - WordNet Dictionary

noun

1. a leading instance in its field
- the new policy will be a pacesetter in community relations
• Syn:
pacesetter
• Hypernyms:
exemplar, example, model, good example
2. an implanted electronic device that takes over the function of the natural cardiac pacemaker
• Syn:
artificial pacemaker
• Hypernyms:
electronic device
3. a specialized bit of heart tissue that controls the heartbeat
• Syn:
cardiac pacemaker, sinoatrial node, SA node
• Hypernyms:
cardiac muscle, heart muscle
4. a horse used to set the pace in racing
• Syn:
pacer, pacesetter
• Derivationally related forms:
pace (for: pacer)
• Hypernyms:
racehorse, race horse, bangtail