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[hep-teyn] /ˈhɛp teɪn/
any of nine isomeric hydrocarbons, C 7 H 16 , of the alkane series, some of which are obtained from petroleum: used in fuels as solvents, and as chemical intermediates.
Origin of heptane
1870-75; hept- + -ane Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for heptane


an alkane existing in nine isomeric forms, esp the isomer with a straight chain of carbon atoms (n-heptane), which is found in petroleum and used as an anaesthetic. Formula: C7H16
Word Origin
C19: from hepta- + -ane, so called because it has seven carbon atoms
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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heptane in Science
A volatile, colorless, highly flammable liquid hydrocarbon obtained in the fractional distillation of petroleum. It is used as a standard in determining octane ratings (combustion characteristics), as an anesthetic, and as a solvent. Heptane is the seventh member of the alkane series. Chemical formula: C7H16.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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