DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   aa
       n 1: a dry form of lava resembling clinkers
       2: an international organization that provides a support group
          for persons trying to overcome alcoholism [syn: Alcoholics
    Anonymous, AA]
       3: an associate degree in arts [syn: Associate in Arts, AA]