qui·​nine | \ ˈkwī-ˌnīn also ˈkwi- or kwi-ˈnīn or ki-ˈnēn or kwi-ˈnēn How to pronounce quinine (audio) \

Definition of quinine

1 : a bitter crystalline alkaloid C20H24N2O2 from cinchona bark used in medicine
2 : a salt of quinine used especially as an antipyretic, antimalarial, and bitter tonic

Examples of quinine in a Sentence

Recent Examples on the Web

The quinine in tonic water will fluoresce a bright blue, as will the darkest spots on an overripe banana. Helen Czerski, WSJ, "Behind Sparkling White Uniforms, an Optical Trick," 24 May 2018 The habituation that the slime molds had learned was specific to the substance: Slime molds that had habituated to caffeine were still reluctant to cross a bridge containing quinine, and vice versa. Katia Moskvitch, WIRED, "Slime Molds Remember—But Do They Learn?," 14 July 2018 Activating sweet connections caused mice drinking quinine to drink more, activating bitter ones turned the normally appealing sweet taste into a horrible one. Simon Makin, Scientific American, "A Matter of Taste: Can a Sweet Tooth Be Switched Off in the Brain?," 30 May 2018 Babesiosis can be treated using drugs that include clindamycin and oral quinine or IV atovaquone and IV azithromycin, according to the CDC. Gregory B. Hladky, courant.com, "Tick-borne Diseases In Connecticut," 6 May 2018 Generally, fake malaria drugs imitate one of two types of common antimalarial medicines: quinines and artemisins. Smithsonian, "Are Fake Drugs The Reason Malaria Sickens Millions a Year?," 24 Apr. 2018 Pamphlets from the Antikamnia Chemical Company, circa 1895 show an easy cheat sheet catalog of the company’s wares, from quinine tablets to codeine and heroin tablets. Jon Kelvey, Smithsonian, "How Advertising Shaped the First Opioid Epidemic," 3 Apr. 2018 While working as a research assistant in 1856, Perkin was attempting to create quinine, then a popular treatment for malaria. Katherine Eisenbrand, PEOPLE.com, "Who Was Google Doodle Subject William Henry Perkin? All About His Colorful Discovery," 12 Mar. 2018 In 1856, an 18-year-old by the name of William Henry Perkin was tasked with finding a cheap way to produce quinine by his chemistry teacher. CNN, "20 world-changing inventions from under 20s," 14 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'quinine.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of quinine

1825, in the meaning defined at sense 1

History and Etymology for quinine

Spanish quina cinchona, from Quechua kina bark

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Time Traveler for quinine

The first known use of quinine was in 1825

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More Definitions for quinine



English Language Learners Definition of quinine

: a drug that is made from the bark of a tree and used especially to treat malaria


qui·​nine | \ ˈkwī-ˌnīn How to pronounce quinine (audio) \

Kids Definition of quinine

: a bitter drug obtained from cinchona bark and used to treat malaria


qui·​nine | \ ˈkwī-ˌnīn also ˈkwin-ˌīn, esp British kwin-ˈēn, ˈkwin-ēn\

Medical Definition of quinine

: a bitter crystalline alkaloid C20H24N2O2 obtained from cinchona bark that is used as a flavoring agent, has antipyretic and analgesic properties, and is administered orally in the form of its salts (as the hydrated sulfate (C20H24N2O2)2·H2SO4·2H2O) as an antimalarial

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More from Merriam-Webster on quinine

Rhyming Dictionary: Words that rhyme with quinine

Spanish Central: Translation of quinine

Nglish: Translation of quinine for Spanish Speakers

Britannica.com: Encyclopedia article about quinine

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