(ˈ)a|fēlyən, (ˈ)af|hē-, (ˈ)ap|hē-, -lēən noun
( plural aphe·lia -yə, -ēə)
Etymology: New Latin, alteration (influenced by Greek words in -ion, diminutive suffix) of aphelium, from apo- + -helium (from Greek hēlios sun) — more at solar
: the point of a planet's or comet's orbit most distant from the sun — opposed to perihelion