尿後膽色素
Urobilin \U`ro*bi"lin\, n. [1st uro- + bile + -in.] (Physiol. Chem.) A yellow pigment identical with hydrobilirubin, abundant in the highly colored urine of fever, and also present in normal urine. See {Urochrome}.
urobilin n : brown bile pigment formed from urobilinogens and found in feces and in small amounts in urine