Geometry. The distance between any given point of an ellipse or hyperbola and one of its foci. In early use also: the distance between the foci…
| 单词 | θ76303 |
| 释义 | the world > matter > physics > electromagnetic radiation > light > emission of light, radiation > [noun] > distance between centre and focus (1) focal distance1705 Geometry. The distance between any given point of an ellipse or hyperbola and one of its foci. In early use also: the distance between the foci… |
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