/ Dictionary / Index F fusel oil: Meaning and Definition of Find definitions for: fu'sel oil" Pronunciation: (fy'zul, -sul), [key] a mixture consisting chiefly of amyl alcohols obtained as a by-product in the fermentation of grains. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Fuseli Fushih Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language