fusel oil
fusel oil
Definition
fu·sel oil (fyo̵̅o̅′zəl, -səl)
noun
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
Etymology: Ger fusel, inferior liquor < L fusilis, fusil
