| 单词 | bipunctual co-ordinates |
| 释义 | > as lemmasbipunctual co-ordinates Hence applied to various other systems, mostly named from the nature of the fixed figure, etc., to which the points are referred; as bipunctual co-ordinates, co-ordinates defining a line or point by reference to two fixed points and a fixed direction. polar co-ordinates, co-ordinates defining a point (in a plane) by reference to a fixed line (initial line or axis) and a fixed point (origin or pole) in that line; the co-ordinates of any point being the length of the straight line (radius vector) drawn to it from the pole, and the angle which this line makes with the axis (as in defining the position of a place by its distance and bearing from a given place). The name polar co-ordinates is also applied to an extension of this system to points in space. So bicircular co-ordinates, bilinear co-ordinates., trilinear co-ordinates, etc.extracted from co-ordinateadj.n.< as lemmas |
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