Histiocyte
A type of white blood cell, also called a macrophage, that is created by the bone marrow. They usually stay in place, but when histiocytes are stimulated by infection or inflammation they become active, attacking bacteria and other foreign matter in the body. See also histiocytosis.
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A tissue macrophage; the class includes hepatic Kupffer cells, alveolar macrophages, giant cells of granulomas, osteoclasts, and dermal Langerhans cells. These cells derive from precursors that normally reside in bone marrow but migrate through the bloodstream to egress into tissues for final differentiation. SYN: histocyte. [histio- + G. kytos, cell]
- cardiac h. a large mononuclear cell found in connective tissue of the heart wall in inflammatory conditions, especially in the Aschoff body. The ovoid nucleus contains a central chromatin mass appearing as a wavy bar in longitudinal section. SYN: Anitschkow cell, Anitschkow myocyte, caterpillar cell.
- sea-blue h. a h. containing cytoplasmic granules that stain bright blue with hematologic stains such as Wright-Giemsa; found in bone marrow and in the spleen, associated with hepatosplenomegaly and thrombocytopenic purpura and in other blood diseases.

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his·tio·cyte 'his-tē-ə-.sīt n MACROPHAGE esp a nonmotile macrophage of extravascular tissues and esp. connective tissue

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n.
a fixed macrophage, i.e. one that is stationary within connective tissue.

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his·tio·cyte (hisґte-o-sīt″) [histio- + -cyte] macrophage. histiocytic adj

Medical dictionary. 2011.

Look at other dictionaries:

  • histiocyte — [ istjɔsit ] n. m. • 1917; du gr. histiôn « voile de navire, tenture, toile » et cyte ♦ Histol. Macrophage libre du tissu conjonctif assurant le remplacement des cellules par phagocytose. ● histiocyte nom masculin Cellule phagocyte (possédant la… …   Encyclopédie Universelle

  • histiocyte — [his′tē ō sīt΄] n. 〚< Gr histion, web, dim. of histos (see HISTO ) + CYTE〛 a large macrophage, found in connective tissue, that participates in the body s reaction to infection and injury histiocytic [his′tē əsit′ik] adj. * * * …   Universalium

  • histiocyte — [his′tē ō sīt΄] n. [< Gr histion, web, dim. of histos (see HISTO ) + CYTE] a large macrophage, found in connective tissue, that participates in the body s reaction to infection and injury histiocytic [his′tē əsit′ik] adj …   English World dictionary

  • Histiocyte — A histiocyte is a cell that is part of the human immune system. It is a tissue macrophage [MeshName|histiocyte] [eMedicineDictionary|Histiocyte] [ [http://wordnet.princeton.edu/perl/webwn?s=histiocyte WordNet Search 3.0 ] ] ( histo = tissue , and …   Wikipedia

  • Histiocyte — Aussi appelé spongiocyte. C est une cellule de taille importante faisant partie du système immunitaire. C est un macrophage du tissu conjonctif (tissu de soutien, remplissage) qui dérive de la moelle osseuse. Au départ, les monocytes immatures… …   Wikipédia en Français

  • histiocyte — noun Etymology: Greek histion web (diminutive of histos) + International Scientific Vocabulary cyte Date: 1924 a nonmotile macrophage of extravascular tissues and especially connective tissue • histiocytic adjective …   New Collegiate Dictionary

  • histiocyte — noun a macrophage, derived from bone marrow, found in connective tissue …   Wiktionary

  • histiocyte — n. macrophage, large white blood cell that absorbs and destroys foreign and infection causing organisms (Biology) …   English contemporary dictionary

  • histiocyte — his·tio·cyte …   English syllables

  • histiocyte — n. a fixed macrophage, i.e. one that is stationary within connective tissue …   The new mediacal dictionary

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