tüümuses küpsenud lümfotsüüt, mille rakumembraani pinnal on antigeenispetsiifiline T-raku retseptor (T cell receptor = TCR), T lymphocyte, is a type of lymphocyte. T cells can be distinguished from other lymphocytes, such as B cells and natural killer cells, by the presence of a T-cell receptor (TCR) on the cell surface. They are called T cells because they mature in the thymus from thymocytes