octane

noun

oc·​tane ˈäk-ˌtān How to pronounce octane (audio)
1
: any of several isomeric liquid alkanes C8H18
2

Examples of octane in a Sentence

an octane rating of 90
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
But as the capital city and, importantly, as the center of the country’s high octane media industry, Delhi’s symbolic significance is highly disproportional to its actual political consequence. Milan Vaishnav, Foreign Affairs, 11 Feb. 2015 If your vehicle isn’t designed to run on higher octane fuels, then filling it with a higher octane fuel won’t necessarily result in more power or economy since the grade of fuel doesn’t impact the engine’s programming. Logan Carter / Jalopnik, Quartz, 27 Mar. 2024 Currently, the national average for 87 octane gas (according to AAA) is about $3 per gallon, which means that hydrogen still costs more than double at the pump. Kristin Shaw, Popular Science, 17 Jan. 2024 The use of pure, electronic-grade octane was dictated by the necessity of not having free-moving ions that could leak electrons from the nano-arrays. IEEE Spectrum, 27 Oct. 2023 So if the usual customer pays $3.50, a customer using one of these two programs would pay $3. Giant Eagle said this discount will be available on all types of fuel, including diesel or higher octane options like premium gas. Sean McDonnell, cleveland, 15 Aug. 2023

Word History

Etymology

International Scientific Vocabulary

First Known Use

1867, in the meaning defined at sense 1

Time Traveler
The first known use of octane was in 1867

Dictionary Entries Near octane

Cite this Entry

“Octane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/octane. Accessed 22 Dec. 2024.

Kids Definition

octane

noun
oc·​tane ˈäk-ˌtān How to pronounce octane (audio)
1
: any of several liquid chemical compounds containing 8 carbon atoms and 18 hydrogen atoms
2
: a number that is used to measure the antiknock characteristics of gasoline with a higher number indicating a smaller chance of knocking

More from Merriam-Webster on octane

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