'Perihelium' definitions:

Definition of 'Perihelium'

From: GCIDE
  • 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]