zograscopehttp://www.oed.com/dictionary/zograscope_n%3Ftab%3Dmeaning_and_usezograscope, n.
First published 1986; not fully revised

zograscopenoun

Obsolete exc. Historical.
  1. 1753–
    An optical instrument, consisting of a vertically suspended convex lens in front of a pivotally adjustable mirror mounted on a stand, designed for the viewing of prints in magnified form and with stereoscopic effect.
    1. 1753
      Zograscopes for viewing perspective Prints.
      in G. Adams, Descr. & Use Universal Trigonometrical Octant 3 (advertisement)
    2. 1953
      The zograscope or optical diagonal machine.
      Annual Science vol. IX. 315 (heading)
    3. 1953
      No reference to the zograscope has so far been found in the literature of the eighteenth or nineteenth centuries, save in certain..advertisements listing instruments made..by [George Adams].
      Annual Science vol. IX. 315
    4. 1969
      Usually described and sold as Georgian shaving mirrors; this, they are not; they are zograscopes,..probably invented about 1750... Also known, during its long life, as an optical machine..intended for viewing prints, etc., in a magnified form.
      E. H. Pinto, Treen 284

zograscope, n. was first published in 1986; not fully revised.

zograscope, n. was last modified in December 2024.