单词	T cell
释义	T cell noun : 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 lymphocyte The immature lymphoid cell, in turn, can be processed into a B cell, which makes infection-fighting antibodies, or a T cell, which recognizes foreign tissue and virally infected cells and directs the activities of the rest of the immune system. Gina Kolata T cells recognize antigen only in association with cell surface molecules encoded by the major histocompatibility complex … Miranda Robertson see helper t cell, killer t cell compare b cell Word History Etymology thymus-derived cell First Known Use 1970, in the meaning defined above Medical Definition T cell noun : any of several lymphocytes (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 called also T lymphocyte see cytotoxic t cell, helper t cell, suppressor t cell, t4 cell
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