polystyrene
noun
poly·sty·rene
ˌpä-lē-ˈstī-ˌrēn 
: a polymer of styrene
especially
: a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials
Examples of polystyrene in a Sentence
Recent Examples on the Web
The institute — whose board members include or have included representatives from the chemical giant BASF Corp., polystyrene manufacturer Dart Container, Eastman Chemical Co. and PepsiCo — is lobbying the federal and state government to get its products into the compost stream.
—
Los Angeles Times, 4 July 2025
Those patterns were embossed into the surface of flat polystyrene chips, which were subsequently inoculated with Pseudomonas aeruginosa and other types of bacteria.
—New Atlas, 25 June 2025
Save some dough by filling the bottom third of the pot with inert materials such as blocks of polystyrene foam from product packaging or packing peanuts (secured in plastic bags).
—Luke Miller, Better Homes & Gardens, 17 June 2025
Twelve states have banned polystyrene foam, which may be the reason for the switch to paper cups.
—Ashley J. Dimella, FOXNews.com, 16 June 2025
See All Example Sentences for polystyrene
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Los Angeles Times, 4 July 2025
Those patterns were embossed into the surface of flat polystyrene chips, which were subsequently inoculated with Pseudomonas aeruginosa and other types of bacteria.
—New Atlas, 25 June 2025
Save some dough by filling the bottom third of the pot with inert materials such as blocks of polystyrene foam from product packaging or packing peanuts (secured in plastic bags).
—Luke Miller, Better Homes & Gardens, 17 June 2025
Twelve states have banned polystyrene foam, which may be the reason for the switch to paper cups.
—Ashley J. Dimella, FOXNews.com, 16 June 2025
See All Example Sentences for polystyrene
Cite this Entry
“Polystyrene.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polystyrene. Accessed 21 Jul. 2025.
Copy CitationKids Definition
polystyrene
noun
poly·sty·rene
ˌpäl-i-ˈstī(ə)r-ˌēn
: a stiff transparent plastic used chiefly in molded products, foams, and sheet materials
Medical Definition
polystyrene
noun
poly·sty·rene
ˌpäl-i-ˈstī(ə)r-ˌēn
: a polymer of styrene
especially
: a rigid transparent thermoplastic that has good physical and electrical insulating properties and is used especially in molded products, foams, and sheet materials
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