From the same as lepra; scaly, i.e. Leprous (a leper) -- leper.
see GREEK lepra
1. in Greek writings scaly, rough.
2. specifically, leprous, affected with leprosy (the Sept. several times for מְצֹרָע and צָרוּעַ ; (Theophrastus, c., p. 2, 6, 4) see λέπρα): Matthew 8:2; Matthew 10:8; Matthew 11:5; Mark 1:40; Luke 4:27; Luke 7:22; Luke 17:12; of one ((Simon)) who had formerly been a leper, Matthew 26:6; Mark 14:3.