an instrument, used mainly in experiments on perception and memory, for displaying visual images for very brief intervals, usually a fraction of a second
WordReference Random House Unabridged Dictionary of American English © 2025
ta•chis•to•scope
(tə kis′tə skōp′),USA pronunciation n. [Psychol.]
ta•chis•to•scop•ic
(tə kis′tə skop′ik),USA pronunciation adj.
- Psychologyan apparatus for use in exposing visual stimuli, as pictures, letters, or words, for an extremely brief period, used chiefly to assess visual perception or to increase reading speed.
- Greek táchist(os), superlative of tachýs swift + -o- + scope
- 1905–10;
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