quinidine

from WordNet (r) 3.0 (2006)

quinidine
    n 1: cardiac drug (trade names Quinidex and Quinora) used to
         treat certain heart arrhythmias [syn: {quinidine},
         {Quinidex}, {Quinora}]

from The Collaborative International Dictionary of English v.0.48

Quinidine \Quin"i*dine\, n. (Chem.)
   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}.]
   [1913 Webster]