retardant

adjective

re·​tar·​dant ri-ˈtär-dᵊnt How to pronounce retardant (audio)
: serving or tending to retard
a growth-retardant substance
retardant noun

Examples of retardant in a Sentence

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.
Jahl noted these same retardant chemicals have also been added into the electrolyte solution of EV batteries. Mack Degeurin, Popular Science, 30 Jan. 2025 Federal data shows that more than 440 million gallons of retardant were applied to federal, state, and private land between 2009 and 2021. Hiroko Tabuchi, New York Times, 10 Jan. 2025 Still, with crews on the ground and retardant and water drops, firefighters were able to keep the fire from spreading to Elderberry Canyon, the Castaic Hydroelectric Power Plant and surrounding communities, according to Cal Fire. Hannah Fry, Los Angeles Times, 23 Jan. 2025 Aerial firefighters have laid down fire retardant over the mountains, painting the peaks in red lines. Npr Staff, NPR, 13 Jan. 2025 See all Example Sentences for retardant 

Word History

First Known Use

1642, in the meaning defined above

Time Traveler
The first known use of retardant was in 1642

Dictionary Entries Near retardant

Cite this Entry

“Retardant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/retardant. Accessed 21 Feb. 2025.

Kids Definition

retardant

adjective
re·​tar·​dant ri-ˈtärd-ᵊnt How to pronounce retardant (audio)
: serving or tending to retard
flame-retardant fabrics

More from Merriam-Webster on retardant

Last Updated: - Updated example sentences
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