Definition of jesuit's bark Jesuit's bark

We found 2 definitions of jesuit's bark from 2 different sources.

What does jesuit's bark mean?

Noun
jesuit's bark - medicinal bark of cinchona trees; source of quinine and quinidine
		cinchona, cinchona bark, Peruvian bark, Jesuit's bark
		bark a sailing ship with 3 (or more) masts

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jesuit's bark (Noun)
A medicine for the treatment of malaria prepared from the bark of various Cinchona trees and shrubs. The main active ingredient was quinine.