Definition of PHANTASMAGORIA

From the Free Meriam-Webster Dictionary: 1) an exhibition of optical effects and illusions; 2a) a constantly shifting complex succession of things seen or imagined; b) a scene that constantly changes; 3) a bizarre or fantastic combination, collection, or assemblage.

From the Free Dictionary: a type of magic lantern show in which rapidly moving images blend, change size, etc.; hence, any series of images that move and change rapidly, as a dream.