You searched for: “chronographs
chronograph (s) (noun), chronographs (pl)
1. An instrument for recording time with extreme exactness: A chronograph is a watch or clock to which various mechanical devices are attached for the same purpose. It is used in astronomical and other observations, in the timing of races, etc.
2. A highly precise instrument that measures, indicates, and records the elapsed time of an event, also those of a brief duration: Jim had a stopwatch, or chronograph, for the precise timing of the athletes competing in the race.
3. A precise time-keeper used for navigational and astronomical purposes: The chronograph was invented by Louis Moinet in 1816 to use in tracking astronomical objects in the sky.

Aircraft piloting, diving, car racing, and submarine movements also use chronographs in the present day.

This entry is located in the following units: chrono-, chron- (page 3) grapho-, graph-, -graph, -graphy, -grapher, -graphia (page 18)