fusel oil

(fyo̵̅o̅zəl, -səl)

an oily, acrid, poisonous liquid occurring in imperfectly distilled alcoholic products and consisting chiefly of amyl alcohols: small amounts contribute to the characteristic flavor of a whiskey

Origin: Ger fusel, inferior liquor < L fusilis, fusil

See fusel oil in American Heritage Dictionary 4

noun
An acrid, oily, poisonous liquid mixture of amyl alcohols, occurring in incompletely distilled alcoholic liquids and used as a solvent and in the manufacture of explosives and pure amyl alcohols.

Origin:

Origin: German Fusel, bad liquor

Origin: , from Low German

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