[ kwin-i-deen, -din ]

  1. a colorless, crystalline alkaloid, C20H24N2O2, isomeric with quinine, obtained from the bark of certain species of cinchona trees or shrubs, used chiefly to regulate heart rhythm and to treat malaria.

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Origin of quinidine

First recorded in 1830–40; quin(ine) + -id3 + -ine2

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British Dictionary definitions for quinidine


/ (ˈkwɪnɪˌdiːn) /

  1. a crystalline alkaloid drug that is an optically active diastereoisomer of quinine: used to treat heart arrhythmias. Formula: C 20 H 24 N 2 O 2

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