Webster's 1913 Dictionary
STEREOPTICON
Ste `re *op "ti *con, n. Etym: [NL. See Stereo-, and Optic. ]
Defn: 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.
New American Oxford Dictionary
stereopticon
ster e op ti con |ˌsterēˈäptiˌkän, ˌsti (ə )r- ˌstɛriˈɑptəkɑn | ▶noun a slide projector that combines two images to create a three-dimensional effect, or makes one image dissolve into another. ORIGIN mid 19th cent.: from stereo- ‘three-dimensional ’ + Greek optikon, neuter of optikos ‘relating to vision. ’
Oxford Dictionary
stereopticon
stereopticon |ˌstɛrɪˈɒptɪk (ə )n, ˌstɪərɪ -| ▶noun a slide projector that combines two images to create a three-dimensional effect, or makes one image dissolve into another. ORIGIN mid 19th cent.: from stereo- ‘three-dimensional ’ + Greek optikon, neuter of optikos ‘relating to vision ’.
The Wordsmith Dictionary