DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   quad
       n 1: one of four children born at the same time from the same
            pregnancy [syn: quadruplet, quad]
       2: a muscle of the thigh that extends the leg [syn:
          quadriceps, quadriceps femoris, musculus quadriceps
    femoris, quad]
       3: (printing) a block of type without a raised letter; used for
          spacing between words or sentences [syn: quad, space]
       4: a rectangular area surrounded on all sides by buildings [syn:
          quad, quadrangle]