quinidine

quin·i·dine

noun \ˈkwin-ə-ˌdēn, -dən\

Definition of QUINIDINE

: a crystalline dextrorotatory stereoisomer of quinine found in some species of cinchona and used chiefly in the form of its hydrated sulfate (C₂₀H₂₄N₂O₂)₂·H₂SO₄·2H₂O to treat irregularities of cardiac rhythm and sometimes in place of quinine as an antimalarial