[apˈhiːlɪən], (Noun)

Definitions:
- the point in the orbit of a planet, asteroid, or comet at which it is furthest from the sun
(e.g: Mars is at aphelion)


Phrases:

Origin:
mid 17th century: alteration of modern Latin aphelium (by substitution of the Greek inflection -on), from Greek aph' hēlion ‘from the sun’