#styrene__cinnamene__phenylethylene__vinylbenzene  a colorless oily liquid; the monomer for polystyrene
  supertype:  #vinyl_polymer__vinylpolymer__vinyl_resin__vinylresin__polyvinyl_resin__polyvinylresin  a thermoplastic derived by polymerization from compounds containing the vinyl group
  subtype:  #polystyrene  a polymer of styrene; a rigid transparent thermoplastic; "expanded polystyrene looks like a rigid white foam and is used as packing or insulation"
     subtype:  #Styrofoam  (trademark) a light resilient foam of polystyrene

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