antiknock Meaning in the Cambridge English Dictionary
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Meaning of “antiknock” in the English Dictionary

"antiknock" in British English

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antiknocknoun [U]

uk   /ˌæn.tiˈnɒk/  us   /ˌæn.t̬iˈnɑːk/
a ​chemical that is ​added to the ​fuel of a ​carengine in ​order to make the ​fuelburn more ​effectively, so that the ​enginestops making a ​regularknockingsound
adjective [before noun] uk   us   /-ɪŋ/
(Definition of antiknock from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
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