inactivation

from WordNet (r) 3.0 (2006)

inactivation
    n 1: the process of rendering inactive; "the gene inactivation
         system"; "thermal inactivation of serum samples" [ant:
         {activation}]
    2: breaking up a military unit (by transfers or discharges)
       [syn: {deactivation}, {inactivation}]

from The Collaborative International Dictionary of English v.0.48

inactivation \inactivation\ n.
   The act or process of inactivating.
   [PJC]