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aphelion: Meaning and Definition of

a•phe•li•on

Pronunciation: (u-fē'lē-un, u-fēl'yun, ap-hē'lē-un), [key]
— pl. a•phe•li•a
  1. the point in the orbit of a planet or a comet at which it is farthest from the sun. Cf. perihelion.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
See also:
aphasic apheliotropic
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