Reflecting circle

Noun

Definitions

1.NounAn 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.

Synonyms

circle circumferentor reflector azimuth circle cyclometer mural circle armillary sphere hour circle spherograph declination circle ecliptic heliotrope

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