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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

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. . Encyclopedia.com. 24 Oct. 2017 <http://www.encyclopedia.com>.

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Tc

Tc • symb. the chemical element technetium.

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"Tc." The Oxford Pocket Dictionary of Current English. . Encyclopedia.com. 24 Oct. 2017 <http://www.encyclopedia.com>.

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Tc

Tc, symbol for the element technetium.

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"Tc." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 24 Oct. 2017 <http://www.encyclopedia.com>.

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"Tc." The Columbia Encyclopedia, 6th ed.. . Retrieved October 24, 2017 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/tc