bilirubin

noun

bil·​i·​ru·​bin ˌbi-li-ˈrü-bən How to pronounce bilirubin (audio)
ˈbi-li-ˌrü-
: a reddish-yellow water-insoluble pigment C33H36N4O6 that is formed by the breakdown of heme, is excreted in a water-soluble form by liver cells into bile, and occurs in blood and urine especially in diseased states see jaundice

Example Sentences

Recent Examples on the Web The candombe drummers who showed rust urine after heavy drumming presented significantly higher levels of lactate dehydrogenase and total bilirubin when compared with those without urine abnormalities. Ncbi Rofl, Discover Magazine, 30 Apr. 2012 Garrett's bilirubin test had come back: 24 milligrams. jsonline.com, 29 Apr. 2022 Garrett was placed under blue lights to treat his jaundice and bring down his bilirubin levels. jsonline.com, 29 Apr. 2022 The blue light helps to make the bilirubin easier for the liver to break down. Rebecca Cairns, CNN, 21 Feb. 2022 That count had dropped to 20,000, and his bilirubin had nearly doubled. New York Times, 14 Oct. 2021 Each appointment is 30 minutes and allows the pediatrician to check the newborn's weight, perform a physical exam, provide counseling, and check the infant's bilirubin levels if necessary. Meredith Spelbring, Detroit Free Press, 30 Mar. 2020 When cholestasis happens, waste product known as bilirubin gets into the bloodstream. Ratika Gupta, SELF, 13 Sep. 2018 The blue light, explained Benes, decreases the level of bilirubin and helps yellowish bruises disappear faster. Cindy Krischer Goodman, sun-sentinel.com, 2 July 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'bilirubin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

Latin bilis + ruber red — more at red

First Known Use

1871, in the meaning defined above

Time Traveler
The first known use of bilirubin was in 1871

Dictionary Entries Near bilirubin

Cite this Entry

“Bilirubin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bilirubin. Accessed 4 Feb. 2023.

Medical Definition

bilirubin

noun
bil·​i·​ru·​bin ˌbil-i-ˈrü-bən, ˈbil-i-ˌ How to pronounce bilirubin (audio)
: a reddish-yellow, crystalline, water-insoluble pigment C33H36N4O6 that is formed by the breakdown of heme, is excreted in a water-soluble conjugated form by liver cells into bile, and occurs in blood and urine especially in diseased states (such as cirrhosis, gallstones, and hemolytic anemia)
… they may become jaundiced, their skin tinged yellow by the release of the pigment bilirubin from their damaged liver.Larry Thompson, Discover

More from Merriam-Webster on bilirubin

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