A bitter alkaloid contained in cinchona-bark, or its salts; used for malarial affections.
A bitter white alkaloid, C20H24N2O2+3H2O from cinchona; used as a tonic and antiperiodic
Syn.: chinin. An alkaloid, C20H24N2O2, obtained from various species of Cinchona. It has a very bitter taste and an alkaline reaction.