psoriasis
noun /səˈraɪəsɪs/
/səˈraɪəsɪs/
[uncountable] (medical)- a skin disease that causes rough red areas where the skin comes off in small piecesWord Originlate 17th cent.: modern Latin, from Greek psōriasis, from psōrian ‘have an itch’, from psōra ‘itch’.