chronometer
- n an accurate clock (especially used in navigation)
- He invented the marine chronometer.
- With no one to note the time for his sights, Oxy's skipper will rely on a specially designed quartz chronometer built into the handle of his sextant.
- Pressed for alternatives, he blurted: "It has been theorized that Grissom could have kicked the wire that would have been attached to the gas chronometer.