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triptane

[trip-teyn]
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noun Chemistry.
  1. a colorless liquid, C7H17, having high antiknock properties as a fuel: used chiefly as an admixture to airplane gasolines.
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Origin of triptane

1940–45; tri(methyl) b(u)tane (with p for b before t). See tri-, methyl
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for triptane

triptane

noun
  1. a colourless highly flammable liquid alkane hydrocarbon, isomeric with heptane, used in aviation fuel; 2,2,3-trimethylbutane. Formula: CH 3 C(CH 3) 2 CH(CH 3)CH 3
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Word Origin

C20: shortened and altered from trimethylbutane; see tri-, methyl, butane
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