Definitions for "TRANSPARENCIES"
Film reproductions of images, in color or black and white, in positive or negative form. Example: 35mm color slides.
Photographs or images appearing on transparent material (such as slides) rather than on opaque material (such as paper.)
the slide forms of a photograph
Keywords:  cockpit, canopies
Cockpit canopies
A panel of glass or plastic having a known level of obscuration, which can be used to test the proper sensitivity level of a beam smoke detector.