polystyrene

noun
poly·​sty·​rene | \ˌpä-lē-ˈstī-ˌrēn \

Definition of polystyrene 

: 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 egg and sperm mixture is placed inside an inner chamber made of sterile and gas-permeable materials: medical-grade polystyrene and synthetic rubber latex/thermoplastic elastomer and a silicone o-ring, according to INVOcell’s website. Carolyn L. Todd, SELF, "These Two Women Both ‘Carried’ Their Baby Using Reciprocal Effortless IVF," 16 Nov. 2018 The catalyst for this rapid process is known are polystyrene microspheres, tiny particles which contain styrene and have a wide range of applications throughout the sciences. David Grossman, Popular Mechanics, "Scientists Can Now Make a Carbon-Trapping Mineral in a Lab," 15 Aug. 2018 The City Council passed a ban on polystyrene foam containers for carryout food and drink in March that will take effect in October 2019. Lorraine Mirabella, baltimoresun.com, "More eateries, businesses do away with plastic straws," 13 July 2018 Major cities including San Jose, San Francisco and Long Beach have banned polystyrene, and Los Angeles officials have been discussing it. David Garrick, sandiegouniontribune.com, "Proposal would ban sale and use of polystyrene in San Diego, affecting cups, egg cartons, coolers, pool toys and more," 31 May 2018 Other researchers had already found that mealworms can digest a particular plastic called polystyrene. The Economist, "Another way to recycle plastic," 24 May 2018 Large private food retailers like McDonald’s, Dunkin’ Donuts, Jamba Juice, and Chick-fil-A already have phased out polystyrene products or plan to phase them out or implement new recycling processes. Camille Harmer, Fortune, "How Banning Plastic Straws Could Make Pollution Even Worse," 12 July 2018 San Diego is considering prohibiting a particularly ubiquitous plastic product: expanded polystyrene (EPS)—better known as styrofoam—which is used widely in takeout food containers, cups, ice chests, and packing peanuts. Camille Harmer, Fortune, "How Banning Plastic Straws Could Make Pollution Even Worse," 12 July 2018 At one point, rescuers dropped packs filled with food, water and flashlights through a crack in the roof of the caverns along with writing materials and instructions to float polystyrene boxes out of the cave with details on their location. James Hookway, WSJ, "Thai Soccer Players, Coach Found Alive in Cave After 10 Days Underground," 3 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'polystyrene.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of polystyrene

1927, in the meaning defined above

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30 Nov 2018

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The first known use of polystyrene was in 1927

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More Definitions for polystyrene

polystyrene

noun
poly·​sty·​rene | \ˌpäl-i-ˈstī(ə)r-ˌēn \

Medical Definition of polystyrene 

: 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

More from Merriam-Webster on polystyrene

Nglish: Translation of polystyrene for Spanish Speakers

Britannica.com: Encyclopedia article about polystyrene

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