DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   xii
       adj 1: denoting a quantity consisting of 12 items or units [syn:
              twelve, 12, xii, dozen]
       n 1: the cardinal number that is the sum of eleven and one [syn:
            twelve, 12, XII, dozen]