octant
octant
[ˈɒkt(ə)nt]
noun
[ˈɒkt(ə)nt]
noun
- an arc of a circle equal to one eighth of its circumference, or the area enclosed by such an arc with two radii of the circle
八分圆
■each of eight parts into which a space or solid body is divided by three planes which intersect (especially at right angles) at a single point
（由三个平面正交分割而成的）卦限八分区之一
■an obsolete instrument in the form of a graduated eighth of a circle, used in astronomy and navigation
八分仪-
- late 17th cent.: from Latin octans, octant- 'half-quadrant', from octo 'eight'
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