(medicine, now rare) Synonym of leprosy in its various senses. / (alchemy, of metals) The supposed impurity or impurities of various metals, understood as causing their deviation from gold.

plural of leprosity

(medicine) Synonym of leprous, afflicted with leprosy. / (botany) Synonym of scaly or lepidote, particularly describing lichens with a granular or powdery thallus.