chronometer
🇺🇸
/krəˈnɑːmɪtər/
🇬🇧
/krəˈnɒmɪtə(r)/
A device that measures time very precisely, often used in navigation or scientific experiments.
The captain checked his chronometer to ensure they were on schedule.
船長檢查了他的計時器以確保他們按時進行。