Dictionary

fusel oil

noun fu·sel oil \ˈfyü-zəl-\

Definition of FUSEL OIL

:  an acrid oily liquid occurring in insufficiently distilled alcoholic liquors, consisting chiefly of amyl alcohol, and used especially as a source of alcohols and as a solvent

Origin of FUSEL OIL

German Fusel bad liquor
First Known Use: 1850

fusel oil

noun fu·sel oil \ˈfyü-zəl-\   (Medical Dictionary)

Medical Definition of FUSEL OIL

:  an acrid oily liquid occurring in insufficiently distilled alcoholic liquors, consisting chiefly of amyl alcohol, and used especially as a source of alcohols and as a solvent

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