WordNet (r) 3.0 (2006):

grain alcohol
    n 1: the intoxicating agent in fermented and distilled liquors;
         used pure or denatured as a solvent or in medicines and
         colognes and cleaning solutions and rocket fuel; proposed
         as a renewable clean-burning additive to gasoline [syn:
         ethyl alcohol, ethanol, fermentation alcohol, grain
         alcohol]