Source : Webster's Revised Unabridged Dictionary (1913)

Cinnamene \Cin"na*mene\, n. [From {Cinnamic}.] (Chem.)
   Styrene (which was formerly called cinnamene because obtained
   from cinnamic acid). See {Styrene}.

Source : WordNet®

cinnamene
     n : a colorless oily liquid; the monomer for polystyrene [syn: {styrene},
          {phenylethylene}, {vinylbenzene}]