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T-cell
T-cell (Thymus-cell or T-lymphocyte) Type of lymphocyte (white blood cell) that is the key to the defence mechanism of the immune system. There are three main kinds of T-cells: Th (helper T-cells), Ts (suppressor T-cells), and Tc (cytotoxic T-cells). Helper T-cells recognize foreign antigens and help other immune cells to act; suppressor T-cells prevent specific immune reactions; and cytotoxic T-cells, or effector T-cells, kill cancerous cells or cells infected with a virus. T-cells are produced in the bone marrow and then move to the thymus gland. See also acquired immune deficiency syndrome (AIDS)
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"T-cell." World Encyclopedia. 2005. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "T-cell." World Encyclopedia. 2005. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O142-Tcell.html "T-cell." World Encyclopedia. 2005. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O142-Tcell.html |
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T-cell
T-cell n. a type of lymphocyte that matures in the thymus and is primarily responsible for cell-mediated immunity. cytotoxic T-c. a T-cell that destroys cancerous cells, virus-infected cells, and allografts. helper T-c. a T-cell that stimulates the production of cytotoxic T-cells. suppressor T-c. a T-cell that prevents an immune response by other T-cells or B-cells to an antigen.
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"T-cell." A Dictionary of Nursing. 2008. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "T-cell." A Dictionary of Nursing. 2008. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O62-Tcell.html "T-cell." A Dictionary of Nursing. 2008. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O62-Tcell.html |
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Tc
Tc • symb. the chemical element technetium. |
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"Tc." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "Tc." The Oxford Pocket Dictionary of Current English. 2009. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1O999-tc.html "Tc." The Oxford Pocket Dictionary of Current English. 2009. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O999-tc.html |
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Tc
Tc symbol for the element technetium . |
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Cite this article
"Tc." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 26 May. 2012 <http://www.encyclopedia.com>. "Tc." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 26, 2012). http://www.encyclopedia.com/doc/1E1-Tc.html "Tc." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 26, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-Tc.html |
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