stereopticon

noun
ste·​re·​op·​ti·​con | \ˌster-ē-ˈäp-ti-kən, ˌstir-\

Definition of stereopticon 

1 : a projector for transparent slides often made double so as to produce dissolving views

First Known Use of stereopticon

1863, in the meaning defined at sense 1

History and Etymology for stereopticon

New Latin, from stere- + Greek optikon, neuter of optikos optic

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The first known use of stereopticon was in 1863

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