Astronomy. Esp. in primary planet. Designating a planet which orbits the sun, as distinguished from a secondary planet or satellite, which orbits a…
| 单词 | θ710 |
| 释义 | the world > the universe > planet > primary planet > [noun] (2) primary planet1664 Astronomy. Esp. in primary planet. Designating a planet which orbits the sun, as distinguished from a secondary planet or satellite, which orbits a… primary1703 Astronomy. A primary planet (cf. sense A. 5). |
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