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polystyrene (n.)

hard, colorless thermoplastic resin, 1922, so called because it is a polymer of styrene.

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Definitions of polystyrene from WordNet

polystyrene (n.)
a polymer of styrene; a rigid transparent thermoplastic;
expanded polystyrene looks like a rigid white foam and is used as packing or insulation
From wordnet.princeton.edu

Dictionary entries near polystyrene

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