The Collaborative International Dictionary
Urochrome
Urochrome \U"ro*chrome\, n. [1st uro- + Gr. ? color.] (Physiol. Chem.) A yellow urinary pigment, considered by Thudichum as the only pigment present in normal urine. It is regarded by Maly as identical with urobilin.
Wiktionary
urochrome
n. (context biochemistry English) A pigment that causes the yellow color in urine. It is a breakdown product of the blood's haemoglobin and is removed by the kidneys.