Definition of octane in English:


Line breaks: oc¦tane
Pronunciation: /ˈɒkteɪn


[mass noun] Chemistry
  • A colourless flammable hydrocarbon of the alkane series, present in petroleum spirit.
    • Chemical formula: C8H18; many isomers, especially the straight-chain isomer ( n-octane). See also isooctane
    More example sentences
    • Carbon in its most reduced form is found in alkanes, which are typically fuels like methane, propane, and octane.
    • Instead, new engines have been designed to run on lower octane gasoline, which is made of hydrocarbons that are resistant to knock.
    • Four different solvent media were considered: octane, tetrahydrofuran, acetonitrile, and water.


late 19th century: from octo- 'eight' (denoting eight carbon atoms) + -ane2.

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Pronunciation: ˌkələrəˈto͝orə
elaborate ornamentation of a vocal melody