Definition of "biofuel" []

• Fuel such as methane produced from renewable biological resources such as plant biomass and treated municipal and industrial waste. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "~ New 'biofuel cell' produces electricity from hydrogen in plain air -- "A pioneering “biofuel cell” that produces electricity from ordinary air spiked with small amounts of hydrogen offers significant potential as an inexpensive and renewable alternative to the costly platinum-based fuel cells that have dominated discussion about the “hydrogen economy” of the future, British scientists reported here today.""
• "In general, the term biofuel is associated with only a few select chemical compounds, especially ethanol (used exclusively as a gasoline replacement in spark-ignition engines) and very large methyl esters in biodiesel (used as a diesel fuel replacement in diesel engines)."
• "SG Biofuels Wins New Backers SG Biofuels Inc., which develops and produces seeds of the jatropha plant for use in biofuel, raised $9.4 million from new and returning investors."