ster·e·op·ti·con 
(stĕr′ē-ŏptĭ-kŏn′, stîr′-)
(stĕr′ē-ŏptĭ-kŏn′, stîr′-)n.
A magic lantern, especially one with two projectors arranged so as to produce dissolving views.
[New Latin : STEREO- + Greek optikon, neuter of optikos, optic; see OPTIC.]