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- Dictionarychronometer/krəˈnɒmɪtə/
noun
- 1. an instrument for measuring time accurately in spite of motion or variations in temperature, humidity, and air pressure.
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noun
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A chronometer is an extraordinarily accurate mechanical timepiece, with an original focus on the needs of maritime navigation. In Switzerland, timepieces certified by the Contrôle Officiel Suisse des Chronomètres (COSC) may be marked as Certified Chronometer or Officially Certified Chronometer. Outside Switzerland, equivalent bodies, such as the Japan Chronometer Inspection Institute, have in the ... Wikipedia