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Synonyms

Styrofoam

American  
[stahy-ruh-fohm] / ˈstaɪ rəˌfoʊm /
Trademark.
  1. a brand of expanded plastic made from polystyrene.


Styrofoam British  
/ ˈstaɪrəˌfəʊm /

noun

  1. (sometimes not capital) a light, expanded polystyrene plastic

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Styrofoam

C20: from polystyrene + foam


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Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Drolma’s team begins packing the best matsutakes into Styrofoam crates, pinching little creased pockets in the packing paper to cushion each mushroom.

From The Wall Street Journal ● Sep. 12, 2026

A woman, an architect in her 40s holding a Styrofoam lawn-flamingo on a stick, told me she’d come every single day so far.

From Slate ● Sep. 8, 2026

The magic of blasting down a wall of water balanced on a few pounds of Styrofoam doesn’t typically translate to the rectangular page; too many efforts feel pompous, ponderous or preening.

From Los Angeles Times ● Apr. 14, 2025

He discovered the mystery blobs one day last month, initially thinking it looked like Styrofoam.

From BBC ● Oct. 12, 2024

The nurse takes a Styrofoam cup with a bendy straw from a little table I did not notice.

From "Blended" by Sharon M. Draper

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