- any of five isomeric hydrocarbons having the formula C6H14, of the alkane series, some of which are obtained from petroleum: used as solvents and chemical intermediates and in fuels.
- a liquid alkane existing in five isomeric forms that are found in petroleum and used as solvents, esp the isomer with a straight chain of carbon atoms (n- hexane). Formula: C 6 H 14
