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  • Webster's Revised Unabridged Dictionary
    • n Pseudoscope (Opt) An instrument which exhibits objects with their proper relief reversed; -- an effect opposite to that produced by the stereoscope.
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Century Dictionary and Cyclopedia
    • n pseudoscope A kind of stereoscope that makes concave parts appear convex, and convex parts concave. Wheatstone's pseudoscope produces these effects by the use of two flint-glass rectangular prisms, which reflect the light coming from the object viewed from their inner surfaces, the latter being, with reference to the eye of the observer, at the angle of total reflection.
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Chambers's Twentieth Century Dictionary
    • n Pseudoscope a species of stereoscope which causes the parts of bodies in relief to appear hollow, and vice versâ
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Webster's Revised Unabridged Dictionary
Pseudo-, + -scope,
Chambers's Twentieth Century Dictionary
Gr. pseudēs, false.


In literature:

The pseudoscope which produces effects opposite to those of the stereoscope is an interesting device.
"Visual Illusions" by Matthew Luckiesh