クロノメーター

noun

chronometer

A precision timepiece used especially in navigation and scientific contexts. The term is a direct loan from English and is used in technical or historical discussions.

• 船ふねの航こう海かい士しはクロノメーターで正せい確かくな時じ刻こくを確かく認にんした。

  The ship's navigator checked the exact time with the chronometer.