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polystyrene

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(päl′i stī′rēn′)

noun

a tough, clear, colorless plastic material, a polymer of styrene, used to make chemical apparatus, containers, etc.

See polystyrene in American Heritage Dictionary 4

noun

A rigid clear thermoplastic polymer that can be molded into objects or made into a foam that is used to insulate refrigerators.

Related Forms:

polˌy·styˈrene adjective

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