Quinine is a drug that is used to treat fevers such as malaria.
quinine in British English
(kwɪˈniːn, US English ˈkwaɪnaɪn)
noun
a bitter crystalline alkaloid extracted from cinchona bark, the salts of which are used as a tonic, antipyretic, analgesic, etc, and in malaria therapy. Formula: C20H24N2O2
Word origin
C19: from Spanish quina cinchona bark, from Quechua kina bark
quinine in American English
(ˈkwaɪˌnaɪn; Chiefly British kwɪˈnin)
noun
1.
a bitter, crystalline alkaloid, C20H24N2O2, extracted from cinchona bark
2.
any compound of this, as quinine sulfate, used in medicine for various purposes, esp. for treating malaria