polystyrene

Definitions of polystyrene
  1. noun
    a polymer of styrene; a rigid transparent thermoplastic
    “expanded polystyrene looks like a rigid white foam and is used as packing or insulation”
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    types:
    Styrofoam
    a light resilient foam of polystyrene
    type of:
    cinnamene, phenylethylene, styrene, vinylbenzene
    a colorless oily liquid; the monomer for polystyrene
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