A young immature cell that matures into a lymphocyte and is characterized by more abundant cytoplasm than in a lymphocyte, a nucleus in which the chromatin is finer than in a lymphocyte (but coarser than in a myeloblast), and one or two rather prominent nucleoli. SYN: lymphocytoblast. [lympho- + G. blastos, germ]

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lym·pho·blast 'lim(p)-fə-.blast n a lymphocyte that has enlarged following stimulation by an antigen, has the capacity to recognize the stimulating antigen, and is undergoing proliferation and differentiation either to an effector state in which it functions to eliminate the antigen or to a memory state in which it functions to recognize the future reappearance of the antigen called also lymphocytoblast compare LEUKOBLAST
lym·pho·blas·tic .lim(p)-fə-'blas-tik adj

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an abnormal cell present in the blood and the blood-forming organs in one type of leukaemia (lymphoblastic leukaemia). It has a large nucleus with very scanty cytoplasm and is thought to be the precursor of the lymphocyte.
lymphoblastic adj.

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lym·pho·blast (limґfo-blast) [lympho- + -blast] a morphologically immature lymphocyte, once thought to represent an early stage in lymphocyte development but now known to be an activated lymphocyte that has been transformed in response to antigenic stimulation. lymphoblastic adj

Medical dictionary. 2011.

Look at other dictionaries:

  • lymphoblast — [lim′fō blast΄] n. [ LYMPHO + BLAST] a primitive cell that is a precursor of a lymphocyte …   English World dictionary

  • Lymphoblast — Lymphoblasts are immature cells which typically differentiate to form mature lymphocytes. Normally lymphoblasts are found in the bone marrow, but in acute lymphoblastic leukemia (ALL), lymphoblasts proliferate uncontrollably and are found in… …   Wikipedia

  • lymphoblast — Often referred to as a blast cell. Unlike other usages of the suffix blast a lymphoblast is a further differentiation of a lymphocyte, T or B , occasioned by an antigenic stimulus. The lymphoblast usually develops by enlargement of a lymphocyte,… …   Dictionary of molecular biology

  • lymphoblast — A lymphocyte that has gotten larger after being stimulated by an antigen. Lymphoblast also refers to an immature cell that can develop into a mature lymphocyte …   English dictionary of cancer terms

  • lymphoblast — noun Etymology: International Scientific Vocabulary Date: circa 1909 a lymphocyte that has enlarged following stimulation by an antigen, has the capacity to recognize the stimulating antigen, and is undergoing proliferation and differentiation… …   New Collegiate Dictionary

  • Lymphoblast — REM Bild eines Lymphozyten Lymphozyten (Singular der Lymphozyt) sind zelluläre Bestandteile des Blutes. Sie umfassen die B Zellen, T Zellen und die natürlichen Killerzellen und gehören zu den sogenannten „weißen Blutkörperchen“ (Leukozyten). Bei… …   Deutsch Wikipedia

  • lymphoblast — lymphoblastic, adj. /lim feuh blast /, n. Cell Biol. a large, metabolically active lymphocyte shortly before it enters into mitosis. [1905 10; LYMPHO + BLAST] * * * ▪ cell       immature white blood cell (leukocyte) that gives rise to a type of… …   Universalium

  • lymphoblast — noun An immature lymphocyte; they proliferate uncontrollably in lymphoblastic leukemia …   Wiktionary

  • Lymphoblast — Lym|pho|blạst [↑Lymphe u. ↑...blast] m; en, en (meist Mehrz.): Jugendform der ↑Lymphozyten …   Das Wörterbuch medizinischer Fachausdrücke

  • lymphoblast — n. (Biology) immature lymphocyte (type of cell) …   English contemporary dictionary

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