Definition of bilirubin in English:

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Pronunciation: /ˌbiləˈro͞obin/


An orange-yellow pigment formed in the liver by the breakdown of hemoglobin and excreted in bile.
Example sentences
  • Normally, the liver processes this bilirubin and excretes it into the bowel through the bile duct.
  • The liver plays an essential role in the metabolism of bilirubin and the excretion of its metabolites into the bile.
  • A healthy liver filters bilirubin, a breakdown product of old red blood cells.


Late 19th century: coined in German from Latin bilis 'bile' + ruber 'red' + -in1.

For editors and proofreaders

Syllabification: bil·i·ru·bin

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