| 释义 |
octant/ˈɒkt(ə)nt/n. 1 an arc of a circle equal to one-eighth of the circumference 八分圆 2 such an arc with two radii, forming an area equal to one-eighth of the circle 八分弧 3 each of eight parts into which three planes intersecting (esp. at right angles) at a point divide the space or the solid body round it 卦限(八部分之一，尤指三个平面以直角相交，把空间分成八个部分) 4 an instrument in the form of a graduated eighth of a circle, used in astronomy and navigation 八分仪 [Latin octans octant- ‘half-quadrant’, from octo ‘eight’] |