UREDO
Etymology
Noun
uredo (plural uredos)
(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.
(medicine) urticaria; nettle-rash
Source: Wiktionary
U*re"do, n. Etym: [L., a blast, blight, a burning itch, fr. urere to
burn, to scorch.]
1. (Bot.)
Definition: 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.)
Definition: Nettle rash. See Urticaria.
Source: Webster’s Unabridged Dictionary 1913 Edition