- T cell, T lymphocyte - a small lymphocyte developed in the thymus; it orchestrates the immune system's response to infected or malignant cells
--1 is a kind of lymphocyte, lymph cell
--1 has particulars:helper T cell, helper cell, CD4 T cell, CD4 cell; killer T cell, killer cell, cytotoxic T cell, CD8 T cell, CD8 cell