| 单词 | semimajor axis |
| 释义 | semimajor axis /sem"ee may"jeuhr, sem"uy-, sem'ee-, sem'uy-/ 1. Geom. one half the major axis of an ellipse. 2. Astron. one half the major axis of the ellipse that one celestial body describes around another, as a planet around the sun or a satellite around a planet, equivalent to the mean distance between the two bodies. [1925-30; SEMI- + MAJOR] |
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