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Term first used by Valentine and later by Paracelsus and van Helmont to denote a spirit that presided over and governed bodily processes.
[L. fr. G. archaios, chief, leader]
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In alchemy, archaeus is the lowest and densest metaphysical entity or spirit of the astral plane, which presides over the growth and continuation of all living beings.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.