Source : Webster's Revised Unabridged Dictionary (1913)

Polymerization \Pol`y*mer`i*za"tion\, n. (Chem.)
   The act or process of changing to a polymeric form; the
   condition resulting from such change.

Source : WordNet®

polymerization
     n : a chemical process that combines several monomers to form a
         polymer or polymeric compound [syn: {polymerisation}]