hyperbilirubinemiaListen to pronunciation(HY-per-bih-lih-ROO-bih-NEE-mee-uh)Higher-than-normal amount of bilirubin in the blood. Bilirubin is a substance formed when red blood cells break down.Search NCI's Dictionary of Cancer TermsStarts withContainsBrowse:ABCDEFGHIJKLMNOPQRSTUVWXYZ#