| Pronunciation: | `peru'heeleeun | ||
| Sponsored Links: | |||
 WordNet Dictionary | |||
| Definition: | [n] periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun | ||
| Antonyms: | aphelion | ||
| See Also: | periapsis, point of periapsis | ||
| |||
| Webster's 1913 Dictionary | |||
| Definition: | \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}.
| ||
| COPYRIGHT © 2000-2009 HYPERDICTIONARY.COM | HYPERDICTIONARY.COM |