"Cytotoxic" refers to something that is toxic or harmful to cells. It can be a substance or treatment that targets and kills cells, often used in the context of chemotherapy or certain medications that aim to destroy cancer cells. Full definition
They compared the number of cytotoxic T cells — which help battle a virus by killing body cells that harbor it — in normal mice and animals missing IL - 33. (sciencemag.org)
Hodi FS, Mihm MC, Soiffer RJ, Haluska FG, Butler M, Seiden MV, Davis T, Henry - Spires R, MacRae S, Willman A, Padera R, Jaklitsch MT, Shankar S, Chen TC, Korman A, Allison JP, Dranoff G. Biologic activity of cytotoxic T lymphocyte - associated antigen 4 antibody blockade in previously vaccinated metastatic melanoma and ovarian carcinoma patients. (cancerresearch.org)
Chemotherapy for MDS patients involves the use of medicines that kill cells cancer cells called cytotoxic agents. (aamds.org)