a machine for projecting opaque objects, as books, on a screen, by means of reflected light.
Origin of opaque projector
First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian an optical device that projects an enlarged image of an opaque object, such as a printed page or photographic print, onto a screen by means of reflected lightAlso called (in Britain and some other countries): episcope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012