stereoscope
noun
- device for viewing a stereoscopic pair of separate images
Wiktionary
Pronunciation: /ˈstɛɹioʊ̯skoʊ̯p/
noun
Etymology: From stereo- + -scope.
- An instrument used for viewing pairs of stereoscopic photographs (stereographs).
“The idea has been repeated under different aspects; sometimes, possibly, it has been repeated too often; but different aspects in such a case do help, as in a stereoscope, to give solidity to the thing seen.”