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

Gasoline is primarily composed of isooctane and heptane.

From Seattle Times ● Aug. 16, 2021

Let us determine the approximate amount of heat produced by burning 1.00 L of gasoline, assuming the enthalpy of combustion of gasoline is the same as that of isooctane, a common component of gasoline.

From Textbooks ● Feb. 14, 2019

At 34.0 °C, the vapor pressure of isooctane is 10.0 kPa, and at 98.8 °C, its vapor pressure is 100.0 kPa.

From Textbooks ● Feb. 14, 2019

Next came tetraethyl lead, introduced in 1922, which acts like a high content of isooctane.

From Time Magazine Archive

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