Chronometer



noun
1.
(a timemeasuring instrument with a special mechanism for keeping time) ក្រូណូម៉ែត្រ
ENGLISH MEANING
noun
1.
An instrument for measuring time; a timekeeper.
2.
A portable timekeeper, with a heavy compensation balance, and usually beating half seconds; -- intended to keep time with great accuracy for use an astronomical observations, in determining longitude, etc.
1.
A metronome