DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   ADA
       n 1: an enzyme found in mammals that can catalyze the
            deamination of adenosine into inosine and ammonia; "ADA
            deficiency can lead to one form of severe combined
            immunodeficiency disease"; "the gene encoding ADA was one
            of the earlier human genes to be isolated and cloned for
            study" [syn: adenosine deaminase, ADA]