octane

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noun oc·tane \ˈäk-ˌtān\

Definition of octane

  1. 1 :  any of several isomeric liquid alkanes C8H18

  2. 2 :  octane number

Examples of octane in a Sentence

  1. an octane rating of 90

Recent Examples of octane from the Web

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'octane'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Origin and Etymology of octane

International Scientific Vocabulary


First Known Use: 1867


OCTANE Defined for English Language Learners

octane

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noun

Definition of octane for English Language Learners

  • : a chemical in petroleum that is used to rate the quality of different kinds of gasoline


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