noun
EXAMPLES FROM CORPUS
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A giant Styrofoam heart to send to your true love, from Better Than a Letter, $ 4. 50.
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Inside, covered by a light packing of Styrofoam bubbles, were thin plastic envelopes showing the glint of metal.
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The Styrofoam plant is now wholly owned by Dow.
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The little Styrofoam houses he used to show off his idea were as far as the scheme advanced during his tenure.