Definition: Ethanol

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Ethanol

A colorless, flammable liquid produced by fermentation of sugars. While it is also the alcohol found in alcoholic beverages, it can be denatured for fuel use. Fuel ethanol is used principally for blending in low concentrations with motor gasoline as an oxygenate or octane enhancer. In high concentrations, it is used to fuel alternative-fuel vehicles specially designed for its use.[1][2][3]

References
  1. http://www1.eere.energy.gov/site_administration/glossary.html#E
  2. http://www.nrel.gov/biomass/glossary.html#E
  3. http://205.254.135.24/tools/glossary/index.cfm?id=E