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alchemy

noun

• a medieval science aimed at the transmutation of metals, especially base metals, into gold [Princeton Review]
• medieval form of chemistry, the chief aim of which was to discover how to turn ordinary metals into gold [Barron]
• a medieval chemical science and speculative philosophy aiming to achieve the transmutation of the base metals into gold, the discovery of a universal cure for disease, and the discovery of a means of indefinitely prolonging life [Taisha]

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