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periheliamore about perihelia

perihelia


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Perihelion  \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}. 




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