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A colorless liquid antiknock additive, C7H16, used in aviation fuels.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Elements & Compounds) a colourless highly flammable liquid alkane hydrocarbon, isomeric with heptane, used in aviation fuel; 2,2,3-trimethylbutane. Formula: CH3C(CH3)2CH(CH3)CH3
[C20: shortened and altered from trimethylbutane; see tri-, methyl, butane]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
a colorless liquid, C7H17, having high antiknock properties as a fuel: used chiefly as an admixture to airplane gasolines.
[1940–45; tri(methyl)b(u)tane (with p for b)]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.