/ Dictionary / Index B biofuel: Meaning and Definition of Find definitions for: bi•o•fu•el Pronunciation: (bī'ō-fy"ul), [key] — n. fuel, as wood or ethanol, derived from biomass. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biofog biog Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language