What does "octant" mean?

The eighth part of a circle; an arc of 45 degrees.

Octant

Common synonyms include: angle instrument, compass, direction finder, eighth of sphere, gauge, historical instrument.

noun

noun ·Rare ·Advanced level

Noun

1
The eighth part of a circle; an arc of 45 degrees.
2
a measuring instrument for measuring angles to a celestial body; similar to a sextant but with 45 degree calibration wordnet
3
The aspect of two planets that are 45°, or one-eighth of a circle, apart.
4
The eighth part of a disc; a sector of 45 degrees; half a quadrant.
5
An instrument for measuring angles, particularly of elevation.

From Latin octāns. Doublet of Octans.

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