leprosity
/lɛˈprɒsɪti/Now rare
noun
1= leprosy.
2 Alchemy. Impurity of a metal; †an instance of this, an impurity ( obsolete ). Compare leprous. Now historical.
3 Botany. Scaliness (of a plant part). Compare leprose, leprous. rare.
Origin
Late Middle English; earliest use found in John Capgrave (1393–1464), prior of Bishop's Lynn, theologian, and historian. From post-classical Latin leprositat-, leprositas leprosy from leprosus + classical Latin -tās.