From WordNet (r) 2.0 (August 2003) [wn]:
gasoline
n : a volatile flammable mixture of hydrocarbons (hexane and
heptane and octane etc.) derived from petroleum; used
mainly as a fuel in internal-combustion engines [syn:
gasolene, gas, petrol]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Gasoline \Gas"o*line\, Gasolene \Gas"o*lene\(? or ?; 104), n.
A highly volatile mixture of fluid hydrocarbons, obtained
mostly from petroleum, as also by the distillation of
bituminous coal. It is used as a fuel for most automobiles
and for many other vehicles with internal combustion engines.
The gasoline of commerce is typically blended with additives
to improve its performance in internal combustion engines.
Gasoline was also used in the early 1900's in making air gas,
and in giving illuminating power to water gas. See
Carburetor.
Syn: petrol[Brit]. [1913 Webster +PJC] Gasoline engine