3 definitions found From The Collaborative International Dictionary of English v.0.48 [gcide]: Aphelion \A*phel"ion\ (?; 277), n.; pl. {Aphelia}. [Gr. ? + ? sun.] (Astron.) That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion. [1913 Webster] From WordNet (r) 2.0 [wn]: aphelia See {aphelion} From WordNet (r) 2.0 [wn]: aphelion n : apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun [ant: {perihelion}] [also: {aphelia} (pl)]
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