| octane | See: Octa-] . <chemistry> Any one of a group of metametric hydrocarcons (C8H18) of the methane series. The most important is a colourless, volatile, inflammable liquid, found in petroleum, and a constituent of benzene or ligroin. Source: Websters Dictionary (01 Mar 1998) |
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| octanes | Eight-carbon saturated hydrocarbon group of the methane series. Include isomers and derivatives. (12 Dec 1998) |