Aphelion

2 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]:

  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)]