The Collaborative International Dictionary of English v.0.48:

Neo-Kantian \Ne`o-Kant"i*an\, a.
   Of or pertaining to Neo-Kantianism.
   [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

Neo-Kantian \Neo-Kantian\, n.
   An adherent of Neo-Kantianism.
   [Webster 1913 Suppl.]