| 词汇 | astronomical |
| 词根词缀 | 词源： 1550s, adj. from astronomy (q.v.). Popular meaning "immense, concerning very large figures" (as sizes and distances in astronomy) is attested from 1899. Astronomical unit (abbrev. A.U.) "mean distance from Earth to Sun," used as a unit of measure of distance in space, is from 1909. |
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