You searched for: “chronometer
chronometer
1. In horlology, the time of day as indicated by a chronometer set to Greenwich Mean Time.
2. An instrument for measuring time; specifically applied to time-keepers adjusted to keep accurate time in all variations of temperature.
3. Chronometers are said to differ from watches by having a more perfect escapement and a compensation balance, and are used for determining longitude at sea, and for other exact observations.
Word Entries at Get Words: “chronometer
chronometer
An instrument for measuring time precisely, originally used at sea.

It is designed to remain accurate through all conditions of temperature and pressure. The first accurate marine chronometer, capable of an accuracy of half a minute a year, was made in 1761 by the English horologist and instrument maker John Harrison.

This entry is located in the following unit: Science and Technology (page 1)
chronometer
An instrument for measuring time precisely, originally used at sea.

It is designed to remain accurate through all conditions of temperature and pressure.

The first accurate marine chronometer, capable of an accuracy of half a minute a year, was made in 1761 by the English horologist and instrument maker John Harrison.

This entry is located in the following unit: Measurements and Mathematics Terms (page 4)