Definition of perihelion
English to English noun - periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
source: WordNet 3.0 - That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion.
source: Webster 1913
Visual Synonyms 
Nearby Word
perihelion, parhelion, prillion, prelone, perilune, parillin, papurilin, purlin, parhelium, prelim, pyrilamine, power line, prolong, praline, proline, purloin, paralian, prolongation, pearl hominy, pyrroline
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