What is "uroerythrin"

Uroerythrin \U`ro*e*ryth"rin\, n. [See 1st Uro-, and Erythrin.] (Physiol. Chem.) A reddish urinary pigment, considered as the substance which gives to the urine of rheumatism its characteristic color. It also causes the red color often seen in deposits of urates.

n. (context biochemistry English) A red pigment (chromophore) associated with the brickdust deposit

Uroerythrin is a red pigment present in the urine, where it is part of a group of yellow, brown and red pigments generally designated as urochrome.