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isooctane

[ahy-soh-ok-teyn] /ˌaɪ soʊˈɒk teɪn/
noun, Chemistry.
1.
the octane C 8 H 18 , used as one of the standards in establishing the octane number of a fuel.
Compare octane number.
Origin of isooctane
1905-1910
First recorded in 1905-10; iso- + octane
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for isooctane

isooctane

/ˌaɪsəʊˈɒkteɪn/
noun
1.
a colourless liquid alkane hydrocarbon produced from petroleum and used in standardizing petrol. Formula: (CH3)3CCH2CH(CH3)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
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