polyurethane

noun

poly·​ure·​thane ˌpä-lē-ˈyu̇r-ə-ˌthān How to pronounce polyurethane (audio)
: any of various polymers that contain NHCOO linkages and are used especially in flexible and rigid foams, elastomers, and resins (as for coatings)

Examples of polyurethane in a Sentence

The floor will need two coats of polyurethane.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
According to Harrington, lemon or citrus oil can help restore depth and shine—but only on floors where the polyurethane has worn off over time. Daley Quinn, Southern Living, 5 Sep. 2025 Saltgator offers its own system-specific SoftGel material, although the company is quick to point out that the system is also compatible with substances such as soft PVC, two-part silicone, and dual-component polyurethane. New Atlas, 3 Sep. 2025 Naturepedic is our go-to mattress brand for sustainably made, eco-friendly products made without flame retardants, polyurethane foam, and a whole host of other toxins that can be found in the mattress market. Julia Harrison, Architectural Digest, 15 Aug. 2025 In a first, scientists at the FAMU-FSU College of Engineering have created a new kind of polyurethane by mixing lignin, a material found in plant cell walls, along with carbon dioxide. Neetika Walter, Interesting Engineering, 14 Aug. 2025 See All Example Sentences for polyurethane

Word History

Etymology

International Scientific Vocabulary

First Known Use

1939, in the meaning defined above

Time Traveler
The first known use of polyurethane was in 1939

Browse Nearby Words

Cite this Entry

“Polyurethane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/polyurethane. Accessed 6 Sep. 2025.

More from Merriam-Webster on polyurethane

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!