T lymphocyte


: any of several lymphocytes (such as a helper T cell) that differentiate in the thymus, possess highly specific cell-surface antigen receptors, and include some that control the initiation or suppression of cell-mediated and humoral immunity (as by the regulation of T and B cell maturation and proliferation) and others that lyse antigen-bearing cells : t cell
T lymphocytes differentiate in the thymus and interact directly with other cells to regulate the immune response or to kill cells expressing the appropriate antigen.Alan F. Williams
Activation of a T lymphocyte requires occupancy of its antigen-specific cell surface receptor … by its appropriate ligand (processed antigen presented by class I or class II MHC molecules) and a second signal from a growth factor.Suryaprakash R. Sambhara et al.
compare b lymphocyte

Examples of T lymphocyte in a Sentence

Recent Examples on the Web His physician, David Golde of UCLA, found a rare T lymphocyte in Moore’s blood that could be coaxed into making an immune-boosting protein. Delthia Ricks, Discover Magazine, 27 Jan. 2010

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'T lymphocyte.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History



First Known Use

1972, in the meaning defined above

Time Traveler
The first known use of T lymphocyte was in 1972

Dictionary Entries Near T lymphocyte

Cite this Entry

“T lymphocyte.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/T%20lymphocyte. Accessed 25 May. 2024.

Kids Definition

T lymphocyte

: T cell

Medical Definition

T lymphocyte

: t cell
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