perihelion
0 synonyms and 0 antonyms for perihelion, grouped by meaning and by how common each one is.
Noun — The point in the elliptical orbit of a comet, planet, etc., where it is nearest to the Sun.
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Etymology
PIE word *sóh₂wl̥ From perihelium (“perihelion”) (obsolete) + -ion (suffix used for other names of apsides). Perihelium is borrowed from Late Latin perihelium, from Ancient Greek περι- (peri-, “around; surrounding”), ultimately from Proto-Indo-European *per- (“before, in front; first”)) + ἥλιος (hḗlios, “sun”) (ultimat...
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