urobilin
/ˌjʊrəˈbaɪlɪn/
noun
- A brownish pigment produced in the intestines from bilirubin, which gives urine its yellow color.
- The yellow color of urine comes mainly from urobilin.
- When you are dehydrated, urobilin becomes more concentrated and your urine looks darker.
- Doctors can measure urobilin levels to check liver function.