catalytic converter

noun

: an automobile exhaust-system component containing a catalyst that causes conversion of harmful gases (such as carbon monoxide and uncombusted hydrocarbons) into mostly harmless products (such as water and carbon dioxide)

Examples of catalytic converter in a Sentence

Recent Examples on the Web
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Laws requiring car manufacturers to put catalytic converters into new vehicles, which reduced harmful emissions, were also taking effect. Benji Jones, Vox, 10 Mar. 2025 For years, the unit was busy investigating cases of people stealing catalytic converters from cars for their metal components like platinum, palladium and rhodium. Brayden Garcia, Fort Worth Star-Telegram, 12 Feb. 2025 Cerium is used in catalytic converters, which reduce combustion engine emissions. Jason Neely and Eric Onstad, USA TODAY, 27 Feb. 2025 According to prosecutors, catalytic converter thefts dropped by more than 60% in the Fresno area after Thomas' April 2023 arrest. Krystal Nurse, USA Today, 29 Mar. 2025 See All Example Sentences for catalytic converter

Word History

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of catalytic converter was in 1955

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Cite this Entry

“Catalytic converter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/catalytic%20converter. Accessed 2 May. 2025.

Kids Definition

catalytic converter

noun
: a device containing a catalyst for changing automobile exhaust into mostly harmless products

More from Merriam-Webster on catalytic converter

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