from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of various isomeric paraffin hydrocarbons with the formula C8H18, found in petroleum and used as a fuel and solvent.
  • n. An octane number.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of the eighteen isomeric aliphatic hydrocarbons (C8H18) found in petroleum, especially an iso-octane 2,2,4 trimethyl-pentane; they are used as fuels and solvents.

from the GNU version of the Collaborative International Dictionary of English

  • n. Any one of a group of metametric hydrocarbons (C8H18) of the methane (paraffin) series. The most important is a colorless, volatile, inflammable liquid, found in petroleum, and a constituent of gasoline or ligroin.

from The Century Dictionary and Cyclopedia

  • n. An oily hydrocarbon, C8H18, of the paraffin series. It occurs in petroleum, and is one of the chief constituents of ligroin. It boils at 124° C. The name is sometimes given to diisobutyl (C8H18).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent


octo- + -ane (Wiktionary)



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