chronometric

chronometer

[kruh-nom-i-ter]
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:
1705–15; chrono- + -meter

chronometric [kron-uh-me-trik] , chronometrical, adjective
chronometrically, adverb
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
chronometer (krəˈnɒmɪtə)
 
n
a timepiece designed to be accurate in all conditions of temperature, pressure, etc, used esp at sea
 
chronometric
 
adj
 
chrono'metrical
 
adj
 
chrono'metrically
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

chronometer
1735, from chrono- "time" + -meter, from Gk. metron "measure."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
chronometer   (krə-nŏm'ĭ-tər)  Pronunciation Key 
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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