Chro-nŏm'e-ter, n.
n. [Fr. chronomètre, from Gr. χρόνος, time, and μέτρον, measure, from the Lat. root met, in metiri, to measure, Skr. mā.]
Sense 1. An instrument for measuring time; a time-keeper.
Sense 2. A portable time-keeper of superior construction, with a heavy compensation-balance, and usually beating half-seconds; — intended to keep time with great accuracy for use in astronomical observations, in determining longitude, &c.
Sense 3. (Mus.) An instrument used to measure or indicate the time of a musical movement.
Pocket chronometer, a chronometer in the form of a large watch, usually beating half-seconds, but, in some cases, four-tenths seconds. — Ship’s chronometer, a large chronometer hung in gimbals for use at sea, in determining longitude, &c. — To rate a chronometer. See RATE.