scotographn.
/ˈskəʊtə(ʊ)ɡrɑːf/, /ˈskəʊtə(ʊ)ɡraf/, U.S. /ˈskoʊdəˌɡræf/ rare.
An instrument for writing in the dark, or without seeing.
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scotograph1808
1808 Repertory Arts, Manuf., & Agric. May 405 A Patent Scotograph, or instrument for writing in the dark.
1869 P. A. Nuttall Dict. Sci. Terms Scotograph, an instrument with which a blind person may write.
1918 Sabbath Recorder 10 June 682/2 ‘Somnambulate,..schism, scintilla, scotograph.’ ‘What is that?’ inquired Helen. ‘That is an instrument for the use of the blind,’ said the teacher.
This entry has been updated (OED Third Edition, June 2011; most recently modified version published online March 2022).
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n.1808