DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   mol
       n 1: the molecular weight of a substance expressed in grams; the
            basic unit of amount of substance adopted under the Systeme
            International d'Unites [syn: gram molecule, mole,
            mol]