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De - Pt| English Dictionary: periastron | by the DICT Development Group |
| 1 result for periastron | |
| From Webster's Revised Unabridged Dictionary (1913) [web1913]: | |
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Periastron \Per`i*as"tron\, n. [NL., fr. Gr. [?] about + [?] a star.] (Astron.) That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter. | |
