octane number

noun

Definition of octane number

: a number that is used to measure the antiknock properties of a liquid motor fuel (such as gasoline) with a higher number indicating a smaller likelihood of knocking

— called also octane rating

— compare cetane number

Examples of octane number in a Sentence

Recent Examples on the Web Fueling requires unleaded pump octane number (PON) 86 or higher. — Joe Michaud, San Diego Union-Tribune, 16 Aug. 2020

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

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Cite this Entry

“Octane number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octane%20number. Accessed 19 Jun. 2021.

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