Dictionary

diascope en · NOUN

Pronunciation

• /ˈdaɪəskəʊp/

Etymology

From dia- + -scope.

Meanings

1. A projector used for projecting transparencies.
   • The diascope passes light through the two-dimensional object (such as a photographic transparency, slide, or film) and uses a converging projection lens to form an enlarged image on a distant screen. 2010, Elizabeth A. Martin, A Dictionary of Science, →ISBN, page 663:
   • The diascope test pattern reference for automatic setup is a transparency (Figure 3), built into all TK47B lenses. 1982, International Broadcast Engineer: IBE. - Volumes 181-196:
   • When it is used to project a slide then at serves as a diascope. 2004, M. Vanaja, Methods Of Teaching Physics, →ISBN, page 90:
2. a slide viewer, a device for looking at small transparent images.
3. A flat piece of glass or transparent plastic, used to examine lesions in the skin
   • The diascope (a flat piece of glass) was used to press out the blood and expose the apple-jelly points of marginal growth. 1898, “Cutaneous Tuberculosis by Auto-infection”, in Indiana Medical Journal:

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