D defs.my
Entry 1 sense Webster, 1913

Quinidine

· Quin·i·dine · IPA /ˈkwɪn.ɪ.diːn/
01 n. An alkaloid isomeric with, and resembling, quinine, found in certain species of cinchona, from which it is extracted as a bitter white crys…
  1. 1.
    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.(Chem.)