quinidine [kwin-i-deen, -din] ExamplesWord Origin noun Pharmacology.
- 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.
Quinidine yields with chromic acid the same decomposition products as quinine.
This reaction is not characteristic of quinine, for with quinidine one gets the same reaction.
Dr de Vrij, for instance, found sometimes more than 20% of quinidine in some samples of quinoidine of commerce.
From the above statement respecting the solubility of quinidine in ether, it appears that the 10 gr.
If this be quinidine, it will be dissolved on the addition of proportionately more ether, while cinchonine will remain unaffected.
British Dictionary definitions for quinidine quinidine noun
- 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
quinidine in Medicine quinidine [kwĭn′ĭ-dēn′] n.
- A colorless crystalline alkaloid that is a stereoisomer of quinine and is used as a treatment for malaria and cardiac arrhythmias.