Definitions for perihelionˌpɛr əˈhi li ən, -ˈhil yən; -ˈhi li ə, -ˈhil yə
Random House Webster's College Dictionary
per•i•he•li•onˌpɛr əˈhi li ən, -ˈhil yən; -ˈhi li ə, -ˈhil yə(n.)(pl.)-he•li•a
the point in the orbit of a planet or comet at which it is nearest to the sun.
Category: Astronomy
Origin of perihelion:
1660–70; < Gk peri-peri - +hḗli(os) sun +-on neut. n. ending, on the model of perigee ; earlier in the NL form perihelium
per`i•he′li•al(adj.)
per`i•he′li•an(adj.)
Princeton's WordNet
perihelion(noun)
periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
Wiktionary
perihelion(Noun)
The point in the elliptical orbit of a planet or comet etc. where it is nearest to the Sun.
Webster Dictionary
Perihelion(noun)
alt. of Perihelium
The Nuttall Encyclopedia
Perihelion
the point on the orbit of a planet or comet nearest the sun.
Citation
Use the citation below to add this definition to your bibliography:
"perihelion." Definitions.net. STANDS4 LLC, 2013. Web. 19 Jun 2013. <http://www.definitions.net/definition/perihelion>.