Uredo

Origin

Latin , a blast, blight, a burning itch, from urere ("to burn or scorch").

Full definition of uredo

Noun

1. (botany) A summer stage in the life history of certain rusts (Uredinales), regarded at one time as a distinct genus, and preceding the teleutospore, or winter stage.
2. (medicine) urticaria; nettle-rash