Meaning of “octane” in the English Dictionary

"octane" in British English

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(Definition of “octane” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"octane" in American English

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octanenoun [ C ]

us /ˈɑk·teɪn/

a chemical substance in gasoline (= liquid fuel) which is used as a measure of its quality

(Definition of “octane” from the Cambridge Academic Content Dictionary © Cambridge University Press)