killer cell

noun Immunology.

1. any of several types of lymphocyte or leukocyte capable of destroying cells that have acquired foreign characteristics, as a tumor cell or virus-infected cell.

noun

1. a type of white blood cell that is able to kill cells, such as cancer cells and cells infected with viruses

n.

1. A large differentiated T cell that attacks and lyses target cells bearing specific antigens.cytotoxic T cell killer T cell null cell