hematoidin


hematoidin
A pigment derived from hemoglobin that contains no iron but is closely related to or identical to bilirubin. H. is formed intracellularly, presumably within reticuloendothelial cells, but is often found extracellularly after 5–7 days in foci of previous hemorrhage. It occurs as refractile, yellow-brown and orange-red granules, but more characteristically as rhomboid plates arranged in a radial pattern, so-called h. burrs. SYN: blood crystals, h. crystals. [hemato- + G. eidos, resemblance, + -in]

* * *

he·ma·toi·din or chiefly Brit hae·ma·toi·din .hē-mə-'tȯid-ənalso .hem-ə- n BILIRUBIN

* * *

he·ma·toid·in (he-mə-toidґin) a yellow-brown or red pigment, apparently chemically identical with bilirubin but with a different site of origin, formed locally in the tissues from hemoglobin, particularly under conditions of reduced oxygen tension.

Medical dictionary. 2011.

Look at other dictionaries:

  • Hematoidin — Hem a*toid in, n. (Physiol. Chem.) A crystalline or amorphous pigment, free from iron, formed from hematin in old blood stains, and in old hemorrhages in the body. It resembles bilirubin. When present in the corpora lutea it is called… …   The Collaborative International Dictionary of English

  • hematoidin — he·ma·toi·din …   English syllables

  • hematoidin — noun an orange yellow pigment in the bile that forms as a product of hemoglobin; excess amounts in the blood produce the yellow appearance observed in jaundice • Syn: ↑bilirubin, ↑haematoidin • Hypernyms: ↑animal pigment * * * ˌ ̷ ̷ ̷ ̷ˈtȯidə̇n… …   Useful english dictionary

  • haemolutein — Hematoidin Hem a*toid in, n. (Physiol. Chem.) A crystalline or amorphous pigment, free from iron, formed from hematin in old blood stains, and in old hemorrhages in the body. It resembles bilirubin. When present in the corpora lutea it is called… …   The Collaborative International Dictionary of English

  • blood crystals — hematoidin crystals in the blood …   Medical dictionary

  • crystal — A solid of regular shape and, for a given compound, characteristic angles, formed when an element or compound solidifies slowly enough, as a result either of freezing from the liquid form or of precipitating out of solution, to allow the… …   Medical dictionary

  • Haematoidin — H[ae]m a*toid in, n. Same as {Hematoidin}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Haemolutein — H[ae]m o*lu te*in ( l[=u] t[ e]*[i^]n), n. [H[ae]mo + corpus luteum.] (Physiol.) See {Hematoidin}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Bilirubin — Bilirubin …   Wikipedia

  • hack — hak vi to cough in a short dry manner hack n a short dry cough Each boldface word in the list below is a chiefly British variant of the word to its right in small capitals. haem HEME haemacytometer HEMACYTOMETER haemadsorbing HEMADSORBING… …   Medical dictionary