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
cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias Something having the form of a quill The fold or plain of a ruff
cardiac drug (trade names Quinidex and Quinora) used to treat certain heart arrhythmias