Source : WordNet®

sensitisation
     n 1: the state of being sensitive (as to an antigen) [syn: {sensitization}]
     2: (psychology) the process of becoming highly sensitive to
        specific events or situations (especially emotional events
        or situations) [syn: {sensitization}]
     3: rendering an organism sensitive to a serum by a series of
        injections [syn: {sensitizing}, {sensitising}, {sensitization}]