epidiascope

• Appareil optique servant à projeter sur un écran des images provenant aussi bien d'objets transparents que d'objets opaques.

A noun referring to an optical device that projects images of both transparent and opaque objects onto a screen.

1. Optical projectorC2formaltechnical

   An optical device that projects images of both transparent and opaque objects onto a screen, used for educational or presentation purposes.

   Projecteur d'épidiascope

   • The professor used an epidiascope to display a page from a rare book.
   • In the old classroom, an epidiascope was used to show diagrams to the students.
   • The museum's epidiascope projected the ancient manuscript clearly.