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Scotograph

noun

Noun

1
An instrument for writing in the dark, or by the blind. obsolete, rare
"Scotograph or writing-machine for use of the blind"
2
An impression made on a photographic plate by a radioactive substance without the intervention of any opaque object other than the screen of the plate. obsolete, rare
""Scotograph" is likely to stick as the popular term for portraits taken by the Röntgen process. It means "shade picture," and its analogy with photograph, which is a "light picture," is sufficiently manifest to help on its vogue."
3
An image of a ghost or other apparition appearing on unexposed film.
"The spirit-faces are sometimes obtained on ordinary paper without the aid of a camera and are called Scotographs."

From scoto- + -graph.

Unscramble this word: scotograph