Webster's English Dictionary

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quadrangle

quad.ran.gle \'kwa:d-.ran-g*l\ \kwa:-'dran-gy*-l*r\ n [ME, fr. MF, fr. LL 
   quadriangulum, fr. L, neut. of quadriangulus qu]adrangular, fr. quadri- + 
   angulus angle 1: QUADRILATERAL  2a: a quadrangular enclosure esp. when 
   surrounded by buildings  2b: the buildings enclosing a quadrangle  3: a 
   tract of country represented by one atlas sheet (as published by the U .s. 
   Geological Survey) - qua.dran.gu.lar aj