dis·in·fec·tant 
(dĭs′ĭn-fĕktənt)
(dĭs′ĭn-fĕktənt)n.
An agent, such as heat, radiation, or a chemical, that is applied to inanimate objects to destroy, neutralize, or inhibit the growth of disease-carrying microorganisms.
adj.
Serving to disinfect.