The Collaborative International Dictionary of English v.0.48:

Salvific \Sal*vif"ic\, a. [L. salficus saving; salvus saved,
   safe + facere to make.]
   Tending to save or secure safety. [Obs.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

salvific
    adj 1: pertaining to the power of salvation or redemption