Cytotoxic

adj. poisonous to cells, toxic to cells

Cytotoxicity is the quality of being toxic to cells. Examples of toxic agents are a chemical substance or an immune cell.Cytotoxicity can be measured by the MTT assay, Trypan blue (TB) assay, Sulforhodamine B (SRB) assay, WST assay and clonogenic assay.Antibody-dependent cell-mediated cytotoxicity (ADCC) describes the cell-killing ability of certain lymphocytes, which requires the target cell being marked by an antibody. Lymphocyte-mediated cytotoxicity, on the other hand, does not have to be mediated by antibodies; nor does complement-dependent cytotoxicity (CDC), which is mediated by the complement system.
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Cy·to·tox·ic adj. Of, relating to, or producing a toxic effect on cells. cy to·tox·ic i·ty n. cytotoxic having a deleterious effect upon cells. [more]Cytotoxic - Community and Resources

Adjective
1. of or relating to substances that are toxic to cells
(pertainym) cytotoxin
2. toxic to cells
(similar) toxic

Cell-killing.