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English definition of “polystyrene”

polystyrene

noun [U]
 
/ˌpɒlɪˈstaɪriːn/ UK (US trademark Styrofoam)
a light plastic material that is wrapped around delicate objects to protect them, and around hot things to keep them hot: polystyrene packaging/polystyrene cupsPlastics and rubberWrapping, packing and loading
(Definition of polystyrene from the Cambridge Learners Dictionary © Cambridge University Press)
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