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chronometer

[kruh-nom-i-ter] /krəˈnɒm ɪ tər/
noun
1.
a timepiece or timing device with a special mechanism for ensuring and adjusting its accuracy, for use in determining longitude at sea or for any purpose where very exact measurement of time is required.
2.
any timepiece, especially a wristwatch, designed for the highest accuracy.
Origin
1705-1715
1705-15; chrono- + -meter
Related forms
chronometric
[kron-uh-me-trik] /ˌkrɒn əˈmɛ trɪk/ (Show IPA),
chronometrical, adjective
chronometrically, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for chronometer
  • The crew saved nothing but what they stood in, and the vessel's papers and chronometer.
  • And an ytterbium clock has the potential to be even more accurate and stable than the cesium chronometer.
  • The regular chronometer movement, because of its delicacy, is out of the question for rough land or water travel.
  • The planetary week is not a grand chronometer of celestial movements or a gauge of seasonal changes.
  • The second method has been around since the invention of the marine chronometer to determine longitude.
  • The chronometer or timekeeper were used for longitude.
  • Another tool he used was a chronometer, which measures time, and he was skilled in reading charts.
  • The time spent in the application of the fertilizer to all the pots on the bench was measured with a chronometer.
  • The marine chronometer: its history and development.
British Dictionary definitions for chronometer

chronometer

/krəˈnɒmɪtə/
noun
1.
a timepiece designed to be accurate in all conditions of temperature, pressure, etc, used esp at sea
Derived Forms
chronometric (ˌkrɒnəˈmɛtrɪk), chronometrical, adjective
chronometrically, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for chronometer
n.

1735, from chrono- "time" + -meter. Related: Chronometric.

Online Etymology Dictionary, © 2010 Douglas Harper
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chronometer in Science
chronometer
  (krə-nŏm'ĭ-tər)   
An extremely accurate clock or other timepiece. Chronometers are used in scientific experiments, navigation, and astronomical observations. It was the invention of a chronometer capable of being used aboard ship, in 1762, that allowed navigators for the first time to accurately determine their longitude at sea.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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