The Collaborative International Dictionary
Pocket chronometer
Chronometer \Chro*nom"e*ter\, n. [Gr. ? time + -meter: cf. F. chronom[`e]tre.]
An instrument for measuring time; a timekeeper.
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.
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(Mus.) A metronome.
Box chronometer. See under Box.
Pocket chronometer, a chronometer in the form of a large watch.
To rate a chronometer. See Rate, v. t.