perihelion : Dictionary / Wörterbuch (BEOLINGUS, TU Chemnitz)

English Dictionary: perihelion	by the DICT Development Group
2 results for perihelion
From WordNet (r) 3.0 (2006) [wn]:
perihelion n periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun Antonym(s): aphelion
From Webster's Revised Unabridged Dictionary (1913) [web1913]:
Perihelion \Per`ihel"ion\, Perihelium \Per`ihe"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}.