polyfoam

[pol-ee-fohm]
noun
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:
poly- + foam

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
The set includes two round sponges and one peanut-shaped polyfoam sponge, all on long plastic handles.
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