- n epidiascope an optical projector that gives images of both transparent and opaque objects
Century Dictionary and Cyclopedia
- n epidiascope An instrument for the optical projection of the images of opaque bodies on a screen by means of reflected or transmitted light. It consists of a lantern-box containing a powerful arc-light, a water-tank for removing heat-rays, and a series of mirrors beneath and above the objective. Nature, Feb. 19, 1903, p. 376. See cut at projecting-lantern.