isooctane

American

[ahy-soh-ok-teyn] / ˌaɪ soʊˈɒk teɪn /

noun

Chemistry.

the octane C 8 H 18 , used as one of the standards in establishing the octane number of a fuel.

isooctane British

/ ˌaɪsəʊˈɒkteɪn /

noun

a colourless liquid alkane hydrocarbon produced from petroleum and used in standardizing petrol. Formula: (CH 3 ) 3 CCH 2 CH(CH 3 ) 2 See also octane number

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of isooctane

First recorded in 1905–10; iso- + octane

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Isobutylene is used in the production of isooctane, a component of some gasolines.

From New York Times

Gasoline is primarily composed of isooctane and heptane.

From Seattle Times

The numbers on the pump, usually in the 80s and 90s, are simply the octane rating, or the percentage of the isooctane in the mixture.

From Seattle Times

For example, gasoline with an 89 octane rating contains 11% heptane and 89% isooctane.

From Seattle Times

Isobutylene is used to make isooctane, a component of aviation fuel.

From Reuters

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023