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 numberLearn More About octane number
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“Octane number.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octane%20number. Accessed 16 Aug. 2022.
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Time Traveler for octane number
The first known use of octane number was in 1931
See more words from the same year