chronometer
US /krəˈnɑː.mə.t̬ɚ/
UK /krəˈnɑː.mə.t̬ɚ/
1.
精密计时器, 天文钟
an instrument for measuring time, especially one designed to keep accurate time in spite of motion or variations in temperature, humidity, and air pressure.
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The ship's captain relied on the chronometer for precise navigation.
船长依靠精密计时器进行精确导航。
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A marine chronometer is essential for determining longitude at sea.
航海天文钟对于确定海上经度至关重要。