Source : Webster's Revised Unabridged Dictionary (1913)

Stereopticon \Ste`re*op"ti*con\, n. [NL. See {Stereo-}, and
   {Optic}.]
   An instrument, consisting essentially of a magic lantern in
   which photographic pictures are used, by which the image of a
   landscape, or any object, may be thrown upon a screen in such
   a manner as to seem to stand out in relief, so as to form a
   striking and accurate representation of the object itself;
   also, a pair of magic lanterns for producing the effect of
   dissolving views.