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biodiesel: a biofuel made from vegetable oils, fats, or greases.
biofuel: fuel produced from biomass.
biomass: organic material made from plants and animals.
cellulose: the principal component of the cell walls of plants, composed of long chains of sugar molecules.
chemical energy: energy stored in the bonds of chemical compounds
dry-mill process: a process in which a feedstock is ground and then treated with enzymes, heat, and yeast to produce ethanol.
ethanol: a clear, colorless fuel, with the chemical formula H3CH2OH, made from the sugars found in plants.
feedstock: the raw material that is used to produce biofuels.
flexible fuel vehicle: vehicle capable of running on gasoline and high-ethanol blends interchangeably.
glucose: a simple sugar occurring widely in most plant and animal tissue.
photosynthesis: the conversion by plants of radiant energy from the Sun into chemical energy in the form of glucose.
thermal (heat) energy: the energy of motion in atoms and molecules.
wet-mill process: a process in which a feedstock is soaked in water to separate the starch, which is then treated with enzymes, heat, and yeast to produce ethanol.