helper T cellhelper T cell
a type of T cell that helps coordinate the immune response, especially by activating B cells: the AIDS virus targets and destroys these T cells
helper T cell
Any of a class of T cells that are activated by interacting with antigen-presenting cells, such as a dendritic cells, and then function to activate other cells of the immune system, including B cells, cytotoxic T lymphocytes, and phagocytes. Activated helper T cells usually have CD4 receptors on the surface. Also called T-helper cell .