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An appliance for aiding one to write in straight lines in the dark or for aiding the blind to write, as used by the U.S. historian W.H. Prescott.
[scoto- + G. graphō, to write]
scotographAn obsolete term for:
(2) An image made on photographic film by a radioactive substance, e.g., Roentgen;
(3) A device allowing one to draw straight lines either in the dark or if blind.