lep ‧ ro ‧ sy /ˈleprəsi/ BrE AmE noun [uncountable]
[ Date: 1500-1600 ; Origin: leprous (12-21 centuries) , from Late Latin leprosus , from lepra ; ⇨ ↑ leper ]
a very serious infectious disease in which the flesh and nerves are gradually destroyed ⇨ leper
—leprous adjective