The Collaborative International Dictionary of English v.0.48:

Talismanic \Tal`is*man"ic\, Talismanical \Tal`is*man"ic*al\, a.
   [Cf. F. talismanique.]
   Of or pertaining to a talisman; having the properties of a
   talisman, or preservative against evils by occult influence;
   magical.
   [1913 Webster]