Defn: A salt of uroxanic acid.
UROXANIC
U`rox*an"ic, a. Etym: [Uric + alloxan.] (Chem.)
Defn: Pertaining to, or designating, an acid, C5H8N4O6, which is obtained, as a white crystalline substance, by the slow oxidation of uric acid in alkaline solution.
UROXANTHIN
U`ro*xan"thin, n. Etym: [1st uro- + xanthin.] (Physiol. Chem.)
Defn: Same as Indican.
URRHODIN
Ur*rho"din, n. Etym: [1st uro- + Gr. (Physiol. Chem.)
Defn: Indigo red, a product of the decomposition, or oxidation, of indican. It is sometimes found in the sediment of pathological urines. It is soluble in ether or alcohol, giving the solution a beautiful red color. Also called indigrubin.
URRY
Ur"ry, n. Etym: [Cf. Gael. uir, uireach, mold, clay.]
Defn: A sort of blue or black clay lying near a vein of coal.
URSA Ur"sa, n. Etym: [L. ursa a she-bear, also, a constellation, fem. of ursus a bear. Cf. Arctic.] (Astron.)