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.

See Examples For:

isooctane

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

From New York Times ● Feb. 15, 2023

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

From Seattle Times ● Aug. 16, 2021

The combustion of 1.00 L of isooctane produces 33,100 kJ of heat.

From Textbooks ● Feb. 14, 2019

For example, there are many compounds other than isooctane that also have a carbon-to-hydrogen mass ratio of 5.33:1.00.

From Textbooks ● Feb. 14, 2019

But isooctane alone makes a poor fuel because it is not volatile enough, does not readily carburet into explodible vapor.

From Time Magazine Archive

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