Definition of Styrofoam™ noun from the Oxford Advanced Learner's Dictionary

 

Styrofoam™

 noun
noun
BrE BrE//ˈstaɪrəfəʊm//
 
; NAmE NAmE//ˈstaɪrəfoʊm//
 
[uncountable](especially North American English)
 
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= polystyrene Styrofoam cups Word Origin 1950s: from polystyrene + foam.
See the Oxford Advanced American Dictionary entry: Styrofoam™

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