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polyfoam

[pol-ee-fohm] /ˈpɒl iˌfoʊm/
noun
1.
a rigid, semirigid, or rubbery foam composed of minute bubbles of air or carbon dioxide embedded in a polymer matrix, often polyurethane: used in mattresses, padding, insulation, etc.
Origin
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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