octane(redirected from C8h18)
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1. Any of various isomeric alkanes with the formula C8H18, found in petroleum and used as a fuel and solvent.
2. An octane number.
(Elements & Compounds) a liquid alkane hydrocarbon found in petroleum and existing in 18 isomeric forms, esp the isomer n-octane. Formula: C8H18. See also isooctane
any of 18 isomeric saturated hydrocarbons having the formula C8H18, some of which are obtained in the distillation of petroleum.
Any of several hydrocarbon compounds having the formula C8H18. Octane is commonly added to gasoline to prevent uneven burning of fuel in internal-combustion engines.