rubedo
nounEtymology From Latin rubēdō (“redness”).
1
Medicine, Sciences A diffused redness of the skin; blushing or flushing.
2
Alchemy, Pseudoscience A "reddening" process, the fourth and final major stage of the alchemical magnum opus.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.