| 单词 | polar coordinate |
| 释义 | > as lemmaspolar coordinate polar coordinate n. Geometry either of a pair of coordinates (r, θ) defining the position of a point in a plane, where r is the length of the straight line connecting the point to a fixed reference point (the origin or pole), and θ is the angle between this line and a fixed reference line (the axis); (also) each of three coordinates in a three-dimensional extension (either spherical or cylindrical) of this system, involving a radial coordinate and one or two angular coordinates; usually in plural. ΚΠ 1816 tr. S. F. Lacroix Elem. Treat. Differential & Integral Calculus 129 The variables in this equation are what Geometers have called polar co-ordinates. 1895 Electrician 27 Sept. 721/1 Dr. Fleming published a new and ingenious method of plotting wave forms with polar co-ordinates. 1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields iv. 154 Certain cases of symmetry are best treated in spherical polar coordinates. < as lemmas |
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