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Definition of chronometer

chronometer

/krəˈnɑː.mɪ.tɚ/
chro · nom · e · ter
Adverb:chronometrically
•
Plural:chronometers
•
Adjective:chronometric
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chronometer Lexical Profile

chronometer Game Scores & Validity

• noun

1

An exceptionally precise instrument for measuring time, specifically one designed to maintain accuracy despite motion or variations in temperature, humidity, and air pressure.

Example

"The museum displayed an original marine chronometer used by 18th-century explorers to determine their exact longitude on the open seas."

Synonyms
View all synonyms for chronometer

Word Nuance & Usage

While generally synonymous with clocks or watches, 'chronometer' is strictly reserved for timepieces that meet rigorous, certified standards of precision, historically serving a critical role in celestial navigation at sea.

• Rhymes for chronometer

• Nearby Words

chronologically
chronologize
chronology
chronometer
chrysalis
chrysanthemum
chrysogonum

Word Origin & Etymology

Coined in the early 18th century from the Greek 'khronos' (time) and 'metron' (measure). It originally referred to an instrument invented by Jeremy Thacker in 1714.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Chronometer. In Wordmom Dictionary. Retrieved Nov 7, 2026, from https://wordmom.com/dictionary/chronometer
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