QUINIDINE
quinidine, Quinidex, Quinora
(noun) cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias
Source: WordNet® 3.1
Noun
quinidine (countable and uncountable, plural quinidines)
(organic compound, medicine) An isomer of quinine that is used as an antiarrhythmic agent.
Source: Wiktionary
Quin"i*dine, n. (Chem.)
Definition: An alkaloid isomeric with, and resembling, quinine, found in
certain species of cinchona, from which it is extracted as a bitter
white crystalline substance; conchinine. It is used somewhat as a
febrifuge. [Written also chinidine.]
Source: Webster’s Unabridged Dictionary 1913 Edition