quinine
/ˈkwaɪnaɪn/
noun
- A bitter-tasting medicine used to treat and prevent malaria, a disease spread by mosquitoes.
- For centuries, quinine was the only effective treatment for malaria.
- The doctor prescribed quinine for the traveler who had caught malaria in the tropics.
- She added a few drops of quinine to the tonic water to give it a bitter flavor.