1. A T lymphocyte (a type of white blood cell) that kills cancer cells, cells that are infected (particularly with viruses), or cells that are damaged in other ways. (wikipedia.org)
2. T cell with CD8 receptor that recognizes antigens on the surface of a virus-infected cell and binds to the infected cell and kill it. (wordnetweb.princeton.edu)
3. A type of T cell that does not express markers of either T or B-cell lineage, but may possess fc receptors for immunoglobulin g. It functions by killing target cell through antibody-dependent cell-mediated cytotoxicity or through perforin, killing cells without prior sensitization (hence, the name). (biology-online.org)
4. Mammalian cell that is capable of lysing antibody-coated target cell. (biology-online.org)
Syn: TC, Cytotoxic T Lymphocyte, CTL, T-Killer cell, cytolytic T cell, CD8+ T-cells or killer T cell, cytotoxic T cell