polystyrene

Noun
  1. A polymer of styrene;
    A rigid transparent thermoplastic (synset 114619891)
    "expanded polystyrene looks like a rigid white foam and is used as packing or insulation"
    is a type of: cinnamene, phenylethylene, styrene, vinylbenzene - a colorless oily liquid; the monomer for polystyrene
    subtypes: styrofoam - a light resilient foam of polystyrene

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