/ Dictionary / Index B bilirubin: Meaning and Definition of Find definitions for: bil•i•ru•bin Pronunciation: (bil'u-r"bin, bil"u-r'bin), [key] — n. Biochem. a reddish bile pigment, CHON, resulting from the degradation of heme by reticuloendothelial cells in the liver: a high level in the blood produces the yellow skin symptomatic of jaundice. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: bilirubin (Thesaurus) bilious biliteral Related Content Daily Word Quiz: pundit Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language