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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Acnode  \Ac"node\,  n.  [L.  acus  needle  +  E.  node.]  (Geom.) 
  An  isolated  point  not  upon  a  curve,  but  whose  co["o]rdinates 
  satisfy  the  equation  of  the  curve  so  that  it  is  considered  as 
  belonging  to  the  curve.