The Collaborative International Dictionary of English v.0.48:

mol \mol\ n. (Chem.)
   A quantity of a substance equal to the molecular weight of a
   substance expressed in grams; a gram molecule; the basic unit
   of amount of substance adopted under the System International
   d'Unites; as, he added two mols of dextrose to the medium.

   Syn: gram molecule, mole.
        [WordNet 1.5]

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]