| 释义 |
coplanar, a.|kəʊˈpleɪnə(r)|
[f. co- + L. plānār-is, f. plānum plane.]
Situated or acting in the same plane.
1862Salmon Geom. Three Dimensions xiv. §510 (1874) 442 The number of points on the line such that the line is coplanar with two of the normals at the point. 1882Minchin Unipl. Kinemat. 11 Coplanar concurrent forces.
Hence coplanarity, |-ˈærɪtɪ|, the property of being coplanar.
1901Gibbs & Wilson Vector Analysis ii. 68 The necessary and sufficient condition for the coplanarity of three vectors A,B,C none of which vanishes is A. (B × C) = O. 1979Nature 26 July 301/1 The regular satellite systems of Jupiter, Saturn and Uranus are remarkable for the near coplanarity and circularity of their orbits. |