Octane meaning

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Any of various isomeric alkanes with the formula C8 H18 , found in petroleum and used as a fuel and solvent.
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An octane number.
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An oily alkane, C8H18, occurring in petroleum, or any of a group of isomers of this substance.
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Any of several hydrocarbons having eight carbon atoms connected by single bonds. It is commonly added to gasoline to prevent knocking from uneven burning of fuel in internal-combustion engines. Octane is the eighth member of the alkane series. Chemical formula: C8H18.
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(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.
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Origin of octane