uroerythrin


From The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]
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