chronometer

from WordNet (r) 3.0 (2006)

chronometer
    n 1: an accurate clock (especially used in navigation)

from The Collaborative International Dictionary of English v.0.48

Chronometer \Chro*nom"e*ter\, n. [Gr. ? time + -meter: cf. F.
   chronom[`e]tre.]
   1. An instrument for measuring time; a timekeeper.
      [1913 Webster]

   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.
      [1913 Webster]

   3. (Mus.) A metronome.
      [1913 Webster]

   {Box chronometer}. See under {Box}.

   {Pocket chronometer}, a chronometer in the form of a large
      watch.

   {To rate a chronometer}. See {Rate}, v. t.
      [1913 Webster] Chronometric

from Moby Thesaurus II by Grady Ward, 1.0

32 Moby Thesaurus words for "chronometer":
      Big Ben, astronavigation, celestial navigation, clock,
      clock movement, clockworks, coastwise navigation, consolan,
      dead reckoning, fix, horologe, horologium, line of position, loran,
      pilotage, plane sailing, point-to-point navigation, radar,
      radio beacon, radio navigation, sextant, shoran, sofar, sonar,
      tables, ticker, timekeeper, timepiece, timer, turnip, watch,
      watchworks