Definitions

1. noun

A yellow compound that occurs in the bile of many animals, including humans, and is a breakdown product of hemoglobin in red blood cells.

“The newborn’s jaundice was caused by an excess of bilirubin in the blood.”

2. noun

A measure of the concentration of bilirubin in the blood, often used to diagnose jaundice in newborns.

“The pediatrician checked the baby’s bilirubin levels to see if the jaundice was severe.”