octane Meaning, Definition & Usage

  1. noun any isomeric saturated hydrocarbon found in petroleum and used as a fuel and solvent

WordNet

Oc"tane noun
Etymology
See Octa-
Definitions
  1. (Chem.) Any one of a group of metametric hydrocarcons (C8H18) of the methane series. The most important is a colorless, volatile, inflammable liquid, found in petroleum, and a constituent of benzene or ligroin.

Webster 1913