Bible Encyclopedias
Alkahest
1911 Encyclopedia Britannica
(a pseudo-Arabic word believed to have been invented by Paracelsus), a liquid, much sought after by the alchemists, having the power of dissolving gold and every other substance, which it was supposed would possess invaluable medicinal qualities.
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Bibliography Information
Chisholm, Hugh, General Editor. Entry for 'Alkahest'. 1911 Encyclopedia Britanica. https://www.studylight.org/encyclopedias/eng/bri/a/alkahest.html. 1910.