aphelion Meaning, Definition & Usage

  1. noun apoapsis in solar orbit; the point in the orbit of a planet or comet that is at the greatest distance from the sun

WordNet

A*phel"ion noun
Etymology
Gr. + sun.
Wordforms
plural Aphelia
Definitions
  1. (Astron.) That point of a planet's or comet's orbit which is most distant from the sun, the opposite point being the perihelion.

Webster 1913