Function: noun
Date: circa 1948
: a device that projects even light through a flat translucent surface over which films or tracings may be spread out and viewed
Function: noun
Date: circa 1948
: a device that projects even light through a flat translucent surface over which films or tracings may be spread out and viewed
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012