stereopticon

 
Pronunciation: /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 century: from stereo- 'three-dimensional' + Greek optikon, neuter of optikos 'relating to vision'