perihelium

1 definition found

perihelium - Collaborative International Dictionary of English v.0.48 :

  Perihelion \Per`i*hel"ion\, Perihelium \Per`i*he"li*um\, n.; pl.
     Perihelia. [NL., fr. Gr. peri` about, near + "h`lios the
     sun.] (Astron.)
     That point of the orbit of a planet or comet which is nearest
     to the sun; -- opposed to aphelion.
     [1913 Webster]