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The Collaborative International Dictionary
Uredinales

Uredo \U*re"do\, n. [L., a blast, blight, a burning itch, fr. urere to burn, to scorch.]

  1. (Bot.) One of the stages in the life history of certain rusts ( 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.

  2. (Med.) Nettle rash. See Urticaria.