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An abnormally large amount of bilirubin in the circulating blood, resulting in clinically apparent icterus or jaundice when the concentration is sufficient.
- neonatal h. serum bilirubin greater than 12.9 mg/dl (220 μol/L) or rising at a rate greater than 5 mg/dl per day; also applied to a nonphysiologic pattern of h., i.e., jaundice in the first 24 hours of life or extending beyond the first week of life in term infants.
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hy·per·bil·i·ru·bin·emia or chiefly Brit hy·per·bil·i·ru·bin·ae·mia -.bil-ē-.rü-bin-'ē-mē-ə n the presence of an excess of bilirubin in the blood called also bilirubinemia
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hy·per·bil·i·ru·bin·emia (hi″pər-bil″ĭ-roo″bĭ-neґme-ə) excessive bilirubin in the blood, which may lead to jaundice; the hyperbilirubinemias are classified as either conjugated or unconjugated, according to the predominant form of bilirubin involved.Medical dictionary. 2011.