What is "athanasia"

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

Is not a scholiastic athanasy better than none?
--Lowell.

Athanasia is a genus of flowering plants in the daisy family.

Athanasia is native to southern Africa.