DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   quadrant
       n 1: a quarter of the circumference of a circle [syn:
            quadrant, quarter-circle]
       2: any of the four areas into which a plane is divided by two
          orthogonal coordinate axes
       3: the area enclosed by two perpendicular radii of a circle
       4: a measuring instrument for measuring altitude of heavenly
          bodies