chronometer
1 synonym for chronometer, grouped by meaning and by how common each one is.
Noun — An instrument for measuring time very precisely, especially the exact time of day.
Synonyms
Rare, literary or technical
Precise, but they will stand out — check the sense before using one.
Etymology
Formed from chrono- and -meter, possibly modelled on the earlier French chronomètre (“metronome”), ultimately from Ancient Greek χρόνος (khrónos, “time”) plus μέτρον (métron, “meter, measuring device”).
Full origin of chronometer →