A plant with roots that are prone to decay or decomposition; historically, any plant used as a source of flux for metallurgical purposes.
Compound from 'flux' (flowing/decaying) + 'root.' An archaic botanical term reflecting older herbalism and alchemy, when plant decay was studied as transformation.
Medieval alchemists believed certain plant roots that easily decomposed held the secret to metal transformation—'fluxroot' captured their belief that decay and renewal were connected.
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