| 单词 | radius vector |
| 释义 | radius vector in British Englishnoun 1. mathematics a line joining a point in space to the origin of polar or spherical coordinates 2. astronomy an imaginary line joining a satellite to the planet or star around which it is orbiting radius vector in American English Word forms: plural radii vecˈtores (vɛkˈtɔriz) or radius vectors 1. a straight line joining the origin of a vector, located at the intersection of two coordinates, to a given point lying in the same plane 2. a vector whose point of origin is fixed and whose terminal point ranges over a given curve or surface, as a straight line connecting the sun with the earth at any point of the earth's orbit |
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