Source : Webster's Revised Unabridged Dictionary (1913)

Phantasma \Phan"tas"ma\, n. [L.]
   A phantasm.

Source : WordNet®

phantasma
     n 1: a ghostly appearing figure; "we were unprepared for the
          apparition that confronted us" [syn: {apparition}, {phantom},
           {phantasm}, {specter}, {spectre}]
     2: something existing in perception only; "a ghostly apparition
        at midnight" [syn: {apparition}, {phantom}, {phantasm}, {shadow}]