Definify.com
Webster 1913 Edition
Octant
1.
(Geom.)
The eighth part of a circle; an arc of 45 degrees.
2.
(Astron. & Astrol.)
The position or aspect of a heavenly body, as the moon or a planet, when half way between conjunction, or opposition, and quadrature, or distant from another body 45 degrees.
3.
An instrument for measuring angles (generally called a
quadrant
), having an arc which measures up to 9O°, but being itself the eighth part of a circle. Cf. Sextant
. 4.
(Math. & Crystallog.)
One of the eight parts into which a space is divided by three coordinate planes.
Webster 1828 Edition
Octant
OC'TANT
,Noun.
In astronomy, that aspect of two planets in which they are distant from each other the eighth part of a circle or 45 degrees.
Definition 2025
Octant
octant
octant
See also: Octant
English
Noun
octant (plural octants)
A nautical octant
- The eighth part of a circle; an arc of 45 degrees.
- (geometry): The eighth part of a disc; a sector of 45 degrees; half a quadrant.
- (nautical): An instrument for measuring angles, particularly of elevation.
Translations
nautical instrument