catalytic converter

US /ˌkæt̬.əˌlɪt̬.ɪk kənˈvɝː.t̬ɚ/
UK /ˌkæt̬.əˌlɪt̬.ɪk kənˈvɝː.t̬ɚ/
"catalytic converter" picture
1.

an apparatus fitted to the exhaust system of a motor vehicle, containing a catalyst for converting pollutant gases into less harmful ones

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The mechanic replaced the faulty catalytic converter.
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New cars are required to have a catalytic converter to reduce emissions.
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catalystcat
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