- 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.
- any timepiece, especially a wristwatch, designed for the highest accuracy.
Origin of chronometer
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Examples from the Web for chronometric
But it was their great astronomer, Ebn Junis, who accomplished the most valuable of all chronometric improvements.History of the Intellectual Development of Europe, Volume II (of 2)
John William Draper
The latitude, chronometric differences of longitude, and magnetic variation, were determined on shore at this southern point.
- a timepiece designed to be accurate in all conditions of temperature, pressure, etc, used esp at sea
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
Word Origin and History for chronometric
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
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