chro·​nom·​e·​ter | \ krə-ˈnä-mə-tər How to pronounce chronometer (audio) \
plural chronometers

Definition of chronometer

: timepiece I don't know about you, but by the time the short fat hand of my analog chronometer is on the six, I'm about ready to take the rest of the day off.— Stanley Bing especially : one designed to keep time with great accuracy despite external forces Self-educated English clockmaker John Harrison (1693-1776) found the answer by inventing a chronometer—a friction-free timepiece, impervious to pitch and roll, temperature and humidity—that would carry the true time from the home port to any destination. — Genevieve Stuttaford

Synonyms for chronometer


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Examples of chronometer in a Sentence

a fancy new chronometer that is light-years more advanced than your average wristwatch
Recent Examples on the Web Mystery Clocks that were introduced in 1912, which presented the hands seemingly floating in midair within the transparent body of the chronometer. Paul Croughton, Robb Report, 19 June 2022 The move would result in the Besnaçon Observatory launching a new chronometer certification. Paige Reddinger, Robb Report, 18 Mar. 2022 Both sizes contain the Co-Axial master chronometer caliber 8800 with a 55-hour power reserve. Carol Besler, Robb Report, 11 Mar. 2022 Sir Ernest stood by under the canvas with chronometer, pencil, and book. Daniella Mccahey, The Conversation, 10 Mar. 2022 Shackleton's brilliant navigator, Frank Worsley, painstakingly calculated the coordinates for the position where Endurance sank using a sextant and chronometer. Jennifer Ouellette, Ars Technica, 9 Mar. 2022 The watch is chronometer certified by the Official Swiss Chronometer Testing Institute (COSC), which guarantees a precision of -4 to +6 seconds per day. Carol Besler, Forbes, 21 Oct. 2021 Beginning in 2022, the ENG300 series of movements will be certified to chronometer-standards using Bremont’s in-house H1 Timing Standard that reflects the same standards as the ISO3159:2009 Chronometer test. Roberta Naas, Forbes, 20 Oct. 2021 The movement is the manufacture caliber MT5400, an automatic chronometer with a non-magnetic silicon hairspring. Carol Besler, Forbes, 24 June 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'chronometer.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of chronometer

circa 1676, in the meaning defined above

History and Etymology for chronometer

chrono- + -meter

Note: Apparently first used in English by the clergyman and natural philosopher William Derham (1657-1735) in Physico-Theology; or a Demonstration of the Being and Attributes of God, from His Works of Creation (London, 1714); see Wolfgang Köberer, "On the First Use of the Term 'Chronometer'," The Mariner's Mirror, vol. 106, no. 2 (2016), pp. 203-06. In French chronomètre was used for a metronome-like device by the musician and pedagogue Étienne Loulié in Elements ou principes de musique (Paris, 1696).

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The first known use of chronometer was circa 1676

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Cite this Entry

“Chronometer.” Dictionary, Merriam-Webster, Accessed 28 Sep. 2022.

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More Definitions for chronometer


chro·​nom·​e·​ter | \ krə-ˈnäm-ət-ər How to pronounce chronometer (audio) \

Medical Definition of chronometer

: an instrument for measuring time especially : one designed to keep time with great accuracy

More from Merriam-Webster on chronometer

Nglish: Translation of chronometer for Spanish Speakers Encyclopedia article about chronometer


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