Definition from Wiktionary, the free dictionary
- IPA: /ˈɒk.teɪn/
octane (plural octanes)
- (chemistry) 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.
isomeric aliphatic hydrocarbons