Jesuits' bark

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Peruvian bark, or the bark of certain species of Cinchona; - so called because its medicinal properties were first made known in Europe by Jesuit missionaries to South America.

See also: Jesuit

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
For reasons of convenience, it was ground into a whitish powder and because of its history, this powder had amusing names like "Countess's powder," "Cardinal's powder," and "Jesuits' bark." The Dauphin of France, the future Louis XIV, caught malaria in 1649 and was treated with the powder that
Thomas Sydenham, practicing medicine in London in the 1660s, accurately described the symptoms of malaria or `intermittent agues' and treated them with a bolus of `the Jesuits' bark mixed with the conserve of red roses'; presumably the latter was to hide the bitter taste.