Found 2 items, similar to Perihelion.
English → English (WordNet) Definition: perihelion perihelion n : periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun [ant: aphelion] [also: perihelia (pl)]
English → English (gcide) Definition: Perihelion Perihelion \Per`i*hel"ion\, Perihelium \Per`i*he"li*um\, n.; pl. Perihelia. [NL., fr. Gr. ? about, near + ? the sun.] (Astron.) That point of the orbit of a planet or comet which is nearest to the sun; -- opposed to aphelion. [1913 Webster]