- pacemaker (n.)
[pacemaker 词源字典]
- also pace-maker, 1884, originally a rider or boat that sets the pace for others in training. Meaning "the node of the heart which determines the beat rate" is from 1910; sense of "man-made device for stimulating and regulating heartbeat" is from 1951. From pace (n.) + maker.[pacemaker etymology, pacemaker origin, 英语词源]