URECHITIN
U`re*chi"tin, n. (Chem.)
Defn: A glucoside extracted from the leaves of a certain plant
(Urechitis suberecta) as a bitter white crystalline substance.
URECHITOXIN
U`re*chi*tox"in, n. Etym: [Urechitin + toxic + -in.] (Chem.)
Defn: A poisonous glucoside found accompanying urechitin, and extracted as a bitter white crystalline substance.
UREDO U*re"do, n. Etym: [L., a blast, blight, a burning itch, fr. urere to burn, to scorch.]
1. (Bot.)
Defn: 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.)
Defn: Nettle rash. See Urticaria.
UREDOSPORE
U*re"do*spore, n. (Bot.)