bilirubin: meaning, definition, pronunciation and examples
LowTechnical/Medical
Quick answer
What does “bilirubin” mean?
An orange-yellow pigment formed in the liver by the breakdown of haemoglobin and excreted in bile.
Audio
Pronunciation
Definition
Meaning and Definition
An orange-yellow pigment formed in the liver by the breakdown of haemoglobin and excreted in bile.
A substance measured in blood tests to assess liver function and diagnose conditions like jaundice.
Dialectal Variation
British vs American Usage
Differences
No significant lexical differences. Spelling and pronunciation are consistent. The medical context is identical.
Connotations
Purely clinical/neutral in both varieties.
Frequency
Equally low frequency in both, confined to medical, biological, and veterinary contexts.
Grammar
How to Use “bilirubin” in a Sentence
The [noun] has a high bilirubin level.Bilirubin is elevated in [condition].The test measures [type of] bilirubin.Vocabulary
Collocations
Examples
Examples of “bilirubin” in a Sentence
adjective
British English
- The bilirubin reading was concerning.
- We need a bilirubin assay.
American English
- The bilirubin test came back high.
- She has a bilirubin measurement scheduled.
Usage
Meaning in Context
Business
Not used.
Academic
Used in medical, biological, and biochemistry papers and textbooks.
Everyday
Virtually never used unless discussing a specific medical test result.
Technical
Core term in hepatology, gastroenterology, paediatrics (neonatal jaundice), and clinical pathology.
Vocabulary
Synonyms of “bilirubin”
Neutral
Watch out
Common Mistakes When Using “bilirubin”
- Misspelling as 'billirubin' or 'biliruben'.
- Using it as a countable noun (e.g., 'a bilirubin') instead of an uncountable/mass noun.
- Confusing 'conjugated' and 'unconjugated' in medical contexts.
FAQ
Frequently Asked Questions
At normal levels, it is a normal waste product. Very high levels, especially in newborns, can be toxic to the brain (kernicterus).
Indirect (unconjugated) bilirubin is the initial, water-insoluble form. Direct (conjugated) bilirubin has been processed by the liver to become water-soluble for excretion.
In high concentrations, it causes a visible yellowing of the skin and the whites of the eyes, known as jaundice.
Yes. Bilirubin is a major component of bile, the digestive fluid produced by the liver and stored in the gallbladder.
An orange-yellow pigment formed in the liver by the breakdown of haemoglobin and excreted in bile.
Bilirubin is usually technical/medical in register.
Bilirubin: in British English it is pronounced /ˌbɪl.ɪˈruː.bɪn/, and in American English it is pronounced /ˌbɪl.ɪˈruː.bɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: BILI (relating to bile) + RUBIN (sounds like 'ruby', a red gem) -> the red-orange pigment found in bile.
Conceptual Metaphor
WASTE PRODUCT (a substance the body needs to dispose of), HEALTH METER (a gauge for liver function).
Practice
Quiz
What is the primary source of bilirubin in the body?