Source : Webster's Revised Unabridged Dictionary (1913)

Retaliatory \Re*tal"i*a*to*ry\, a.
   Tending to, or involving, retaliation; retaliative; as
   retaliatory measures.

Source : WordNet®

retaliatory
     adj : of or relating to or having the nature of retribution;
           "retributive justice demands an eye for an eye" [syn: {relatiative},
            {retributive}, {retributory}, {vindicatory}]