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The Collaborative International Dictionary
Scotoscope

Scotoscope \Sco"to*scope\ (? or ?), n. [Gr. sko`tos darkness + -scope.] An instrument that discloses objects in the dark or in a faint light. [Obs.]
--Pepys.

Wiktionary
scotoscope

n. An instrument that discloses objects in the dark or in a faint light.