The Collaborative International Dictionary of English v.0.48:

Athanasia \Ath`a*na"si*a\, Athanasy \A*than"a*sy\, n. [NL.
   athanasia, fr. Gr. ?; ? priv. + ? death.]
   The quality of being deathless; immortality.
   [1913 Webster]

         Is not a scholiastic athanasy better than none?
                                                  --Lowell.
   [Webster 1913 Suppl.]