What does biliverdin mean?
Biliverdin is a green pigment found in bile and formed when the yellow-orange pigment bilirubin undergoes oxidation. The process is part of the normal breakdown of hemoglobin and the subsequent metabolism of bile pigments. When the conversion of bilirubin into bile acids is disrupted, biliverdin may accumulate and give bile or other biological material a green coloration. The term also appears in biochemical research, diagnostic medicine, and studies of pigment metabolism. Biliverdin is related to bilirubin in both function and name, but it is chemically distinct and should not be used as a synonym for it. Although uncommon in general conversation, the word is useful in scientific and medical contexts because it identifies a specific intermediate in the pathway that breaks down heme-derived pigments and produces bile acids.
nounA green bile pigment formed by the oxidation of bilirubin. It occurs in bile and other biological materials and can also be produced in laboratory and industrial processes.
- The green pigment formed by the oxidation of bilirubin.
"The sample turned green as bilirubin was oxidized to biliverdin."
"Biliverdin accumulates when the normal conversion of bilirubin into bile acids is impaired."
"The chemist identified a green compound in the sample and confirmed that it was biliverdin."
Usually treated as an uncountable noun in biochemical writing, but the plural biliverdins is used when referring to multiple quantities or instances.
"The concentrations of the biliverdins were measured using spectrophotometry."
Biliverdin is the reason oxidized bile can look green: bilirubin first becomes biliverdin before further chemical changes can turn it brown.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does biliverdin come from?
The name biliverdin combines Latin bilis, meaning “bile,” with French verdin, a term associated with a green pigment or green coloration. Its components reflect the substance’s origin in bile and its characteristic green color. The word belongs to the same lexical family as bilirubin, whose name similarly combines “bile” with a reference to color.
How biliverdin is actually used
This is specialized biochemical and medical terminology. In clinical writing it is usually treated as an uncountable noun, although plural forms occasionally occur in scientific contexts.
Easily confused with biliverdin
Bilirubin is the yellow-orange pigment produced when hemoglobin breaks down, whereas biliverdin is the green pigment formed when bilirubin is oxidized.