Uredo

‖n. [ L., a blast, blight, a burning itch, fr. urere to burn, to scorch. ] [ 1913 Webster ]

1. (Bot.) One of the stages in the life history of certain rusts (order Uredinales), regarded at one time as a distinct genus. It is a summer stage preceding the teleutospore, or winter stage. See Uredinales, in the Supplement. [ 1913 Webster ]

2. (Med.) Nettle rash. See Urticaria. [ 1913 Webster ]