Octane



[ok-teyn] /ˈɒk teɪn/

noun, Chemistry.
1.
any of 18 isomeric saturated hydrocarbons having the formula C 8 H 1 8 , some of which are obtained in the distillation and cracking of petroleum.
2.
.
/ˈɒkteɪn/
noun
1.
a liquid alkane hydrocarbon found in petroleum and existing in 18 isomeric forms, esp the isomer n-octane. Formula: C8H18 See also isooctane
n.

hydrocarbon of the methane series, 1872, coined from octo- (see octa-) + -ane; so called because it has eight carbon atoms. A fuel’s octane rating, in reference to its anti-knocking quality, is attested from 1932.
octane
(ŏk’tān’)
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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  • Octane-number

    noun 1. (of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics. noun 1. a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane […]



  • Octane-rating

    noun 1. (of gasoline) a designation of antiknock quality, numerically equal to the percentage of isooctane by volume in a mixture of isooctane and normal heptane that matches the given gasoline in antiknock characteristics. noun 1. a measure of the quality of a petrol expressed as the percentage of isooctane in a mixture of isooctane […]

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    [ok-tang-guh l] /ˈɒk tæŋ gəl/ adjective 1. . noun 2. . /ˈɒktæŋɡəl/ noun 1. a less common name for octagon



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