The Collaborative International Dictionary of English v.0.48:

Cosmorama \Cos`mo*ra"ma\ (k?z`m?-r?"m? or -r?"m?), n. [NL., fr.
   Gr. ko`smos the world + "o`rama a sight, spectacle, fr.
   "ora^n to see.]
   An exhibition in which a series of views in various parts of
   the world is seen reflected by mirrors through a series of
   lenses, with such illumination, etc., as will make the views
   most closely represent reality.
   [1913 Webster]