Bilirubin
WordNet
noun
(1) An orange-yellow pigment in the bile that forms as a product of hemoglobin; excess amounts in the blood produce the yellow appearance observed in jaundice
WiktionaryText
Noun
- A bile pigment that is product of the breakdown of the heme portion of hemoglobin. This happens within macrophages as they digest red blood cells. Extremely high levels of bilirubin cause jaundice.