1. 
   Megalethoscope
   Meg`a·leth'o·scope noun [ Mega- + alethoscope .] An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.
   Found op http://www.encyclo.co.uk/webster/M/41
   
   
2. 
   megalethoscope
   <instrument> An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope. ... Origin: Mega- + alethoscope. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?megalethoscope
   
   
3. 
   Megalethoscope
   • (n.) An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.
   Found op http://thinkexist.com/dictionary/meaning/megalethoscope/
   
   
4. 
   Megalethoscope
   The megalethoscope is an optical apparatus designed by Carlo Ponti of Venice circa 1870. In it, photographs are viewed through a large lens, which creates the optical illusion of depth and perspective. The albumen photographs are either backlit by an internal light source—usually an oil or kerose...
   Found op http://en.wikipedia.org/wiki/Megalethoscope
   
   

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