Last Updated
：2025/11/29
reflecting circle
Noun
Japanese Meaning
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。
（ plural ）
Quizzes for review
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.
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reflecting circle
The navigator carefully calibrated the reflecting circle before taking the latitude reading at dawn.
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The navigator carefully calibrated the reflecting circle before taking the latitude reading at dawn.
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