Chronometer为英语名词，音标为英/krəˈnɒmɪtə/、美/krəˈnɑːmɪtər/，指高精度计时仪器，译为“精密记时表”或“航海经线仪”，特指通过精确计时辅助海上定位导航的专业设备。

noun

1

a high-precision timepiece designed for accuracy in all conditions (temperature, pressure, etc.), particularly used in navigation, scientific experiments, and astronomical observations. Derived from the Greek roots 'chrono' (time) and 'meter' (measure), the term reflects its function as a precise time-measuring instrument. As defined by ISO 3159 standard, a chronometer must adhere to rigorous testing conditions including multi-position and temperature variations.

柯林斯英汉双解大词典

chronometer /krəˈnɒmɪtə/ ( chronometers )

1.N-COUNT A chronometer is an extremely accurate clock that is used especially by sailors at sea. 航行表其复数形式为chronimeters。

需注意与chronograph的术语区别：前者指通过天文台认证的精密计时装置，后者特指配备计时功能的腕表功能组件。

electron chronometer 电子精确计时器 ; 电子计时器

half chronometer[计量] 半精密记时表 ; 半精密记时表

chronometer sidereal 恒星时计

chronometer room 天文钟室

chronometer box 天文钟柜

chronometer start 天文钟开始 ; 启动天文钟 ; 天文台表开始

chronometer chest 天文钟柜

precision chronometer 记录式精密记时器

chronometer clock 精密记时计

marine chronometer 航海时计

瑞士官方天文台认证中心制定的机芯检测标准要求日误差范围控制在-4至+6秒之间。德国格拉苏蒂原创建立了自有检测标准，包含24天整表测试及美学标准验证流程。劳力士超级天文台认证体系将精度标准提升至日误差-2至+2秒，需通过5种位置和3种温度条件下的持续检测。ISO 3159标准明确定义了机械天文台腕表的检测流程，要求对装配完成的整表进行15天连续测试。

The problem was not solved completely until the invention of the marine chronometer in the eighteenth century.

这个问题直到十八世纪发明了航海天文钟才得以解决。

Ancient chronometer glossary is a weak part in the study of ancient Chinese glossary.

古天文词汇是古汉语词汇研究中的薄弱环节。

The distribution has much use at the aspect of military armament design and observation of chronometer.

这一分布在军事中武器精度的研究、天文观测等多方面都很有利用价值。

Chronometer time minus watch time The fog was dispelled at ten o'clock.

天文钟时间减钟表时间雾在十点钟时消散了。

Chronometer time plus watch time

天文钟时间加钟表时间

A one-second error in marine chronometers could cause 500-meter deviation in maritime positioning.

航海天文钟每秒误差会导致约500米海上定位偏差。