English Dictionary

reflecting circle

名詞

An astronomical instrument for measuring angles, like the sextant or Hadley's quadrant, by the reflection of light from two plane mirrors which it carries, and differing from the sextant chiefly in having an entire circle.

日本語の意味

全円を用いる反射式天文測定器。セクスタントやハドリーの四分儀に似ており、2枚の平面鏡により反射した光を使って角度を測定する装置。

The navigator carefully calibrated the reflecting circle before taking the latitude reading at dawn.

航海士は夜明けに緯度を測る前に、二枚の平面鏡で光を反射して角度を測定する全円反射器を慎重に校正した。

意味（1）

An astronomical instrument for measuring angles, like the sextant or Hadley's quadrant, by the reflection of light from two plane mirrors which it carries, and differing from the sextant chiefly in having an entire circle.

reflecting circles （ plural ）