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alidade

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alidade


  1  definition  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Alidade  \Al"i*dade\,  n.  [LL.  alidada,  alhidada  fr  Ar 
  al-'id[=a]da  a  sort  of  rule:  cf  F.  alidade.] 
  The  portion  of  a  graduated  instrument,  as  a  quadrant  or 
  astrolabe,  carrying  the  sights  or  telescope,  and  showing  the 
  degrees  cut  off  on  the  arc  of  the  instrument  --Whewell. 




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