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A colorless liquid antiknock additive, C7H16, used in aviation fuels.
(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]
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)]