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stereopticon

[ster-ee-op-ti-kuh n, -kon, steer-]
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noun Optics.
  1. a projector usually consisting of two complete lanterns arranged so that one picture appears to dissolve while the next is forming.
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Origin of stereopticon

1860–65, Americanism; stere(o)- + Greek optikón (neuter) optic
Related formsster·e·op·ti·can, adjectivester·e·op·ti·cian [ster-ee-op-tish-uh n, steer-] /ˌstɛr i ɒpˈtɪʃ ən, ˌstɪər-/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for stereoptican

stereopticon

noun
  1. a type of projector with two complete units arranged so that one picture dissolves as the next is forming
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Word Origin

C19: from stereo- + Greek optikon, neuter form of optikos optic
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for stereoptican

n.

"double magic lantern producing dissolving views," from stereo- + Greek optikon, neuter of optikos "pertaining to sight" (see optic).

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Online Etymology Dictionary, © 2010 Douglas Harper