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heliacal

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heliacal


  2  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Heliacal  \He*li"a*cal\,  a.  [Gr.  ?  belonging  to  the  sun,  fr  ? 
  the  sun:  cf  F.  h['e]liaque.]  (Astron.) 
  Emerging  from  the  light  of  the  sun,  or  passing  into  it 
  rising  or  setting  at  the  same  or  nearly  the  same  time  as 
  the  sun.  --Sir  T.  Browne. 
 
  Note:  The  heliacal  rising  of  a  star  is  when  after  being  in 
  conjunction  with  the  sun,  and  invisible,  it  emerges 
  from  the  light  so  as  to  be  visible  in  the  morning 
  before  sunrising.  On  the  contrary,  the  heliacal  setting 
  of  a  star  is  when  the  sun  approaches  conjunction  so 
  near  as  to  render  the  star  invisible. 
 
  From  WordNet  r  1.6  [wn]: 
 
  heliacal 
  adj  :  pertaining  to  or  near  the  sun;  especially  the  first  rising 
  of  a  star  after  and  last  setting  before  its 
  invisibility  owing  to  its  conjunction  with  the  sun; 
  "the  heliacal  rising  of  the  Dog  Star";  "the  heliacal  or 
  Sothic  year  is  determined  by  the  heliacal  rising  of 
  Sothis  (the  Egyptian  name  for  the  Dog  Star)  [syn:  {heliac}] 




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