1. any of nine isomeric hydrocarbons, C7H16, of the alkane series, some of which are obtained from petroleum: used in fuels as solvents, and as chemical intermediates.


  1. an alkane existing in nine isomeric forms, esp the isomer with a straight chain of carbon atoms (n- heptane), which is found in petroleum and used as an anaesthetic. Formula: C 7 H 16

  1. A volatile, colorless, highly flammable liquid hydrocarbon obtained in the fractional distillation of petroleum. It is used as a standard in determining octane ratings (combustion characteristics), as an anesthetic, and as a solvent. Heptane is the seventh member of the alkane series. Chemical formula: C7H16.

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