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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Almucantar  \Al`mu*can"tar\,  n.  [F.  almucantarat  almicantarat 
  ultimately  fr  Ar  al-muqantar[=a]t,  pl.,  fr  qantara  to 
  bend,  arch.]  (Astron.) 
  A  small  circle  of  the  sphere  parallel  to  the  horizon;  a 
  circle  or  parallel  of  altitude.  Two  stars  which  have  the  same 
  almucantar  have  the  same  altitude.  See  {Almacantar}. 
  {Almucanter  staff},  an  ancient  instrument,  having  an  arc  of 
  fifteen  degrees,  formerly  used  at  sea  to  take  observations 
  of  the  sun's  amplitude  at  the  time  of  its  rising  or 
  setting,  to  find  the  variation  of  the  compass.