Quinine
/kwˈaɪˌnaɪn/
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Definition
(noun) An alkaloid with the chemical formula C₂₀H₂₄N₂O₂, originally derived from cinchona bark (from plants of the genus Cinchona), used to treat malaria and as an ingredient of tonic water, which presents as a bitter colourless powder; also, a drug containing quinine or a chemical compound derived from it.
Sentence Examples
Tonic water contains quinine.
That drug is a derivative of quinine.
CEFR Practice Quiz
The bitter taste of tonic water comes from ____, which was originally used to treat malaria.