Source : Webster's Revised Unabridged Dictionary (1913)

Apparitional \Ap`pa*ri"tion*al\, a.
   Pertaining to an apparition or to apparitions; spectral. ``An
   apparitional soul.'' --Tylor.

Source : WordNet®

apparitional
     adj : like or being a phantom; "a ghostly face at the window"; "a
           phantasmal presence in the room"; "spectral
           emanations"; "spiritual tappings at a seance" [syn: {ghostlike},
            {ghostly}, {phantasmal}, {spectral}, {spiritual}]