Definify.com
Webster 1913 Edition
Stereopticon
Steˊre-op′ti-con
,Noun.
 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. 
Definition 2025
stereopticon
stereopticon
English
Noun
stereopticon (plural stereopticons)
-  A magic lantern, especially one with two projectors arranged so as to produce dissolving views or combinations of images.
-  1898, Winston Churchill, chapter 1, in The Celebrity:- The stories did not seem to me to touch life. […] They left me with the impression of a well-delivered stereopticon lecture, with characters about as life-like as the shadows on the screen, and whisking on and off, at the mercy of the operator.
 
 
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