Quiz: Remember the definition of mal de mer?


[tuh-kis-tuh-skohp] /təˈkɪs təˌskoʊp/
noun, Psychology
an 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.
1905-10; < Greek táchist(os), superlative of tachýs swift + -o- + scope
Related forms
[tuh-kis-tuh-skop-ik] /təˌkɪs təˈskɒp ɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
Examples from the web for tachistoscope
  • His visual perceptual span can be measured with a tachistoscope.
  • The way this is measured is with an apparatus called a tachistoscope.
  • None of the visual skills instructors reported using strobe techniques, a tachistoscope, or a slide projector.
British Dictionary definitions for tachistoscope


an instrument, used mainly in experiments on perception and memory, for displaying visual images for very brief intervals, usually a fraction of a second
Derived Forms
tachistoscopic (təˌkɪstəˈskɒpɪk) adjective
tachistoscopically, adverb
Word Origin
C20: from Greek takhistos swiftest (see tachy-) + -scope
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Cite This Source
tachistoscope in Medicine

tachistoscope ta·chis·to·scope (tā-kĭs'tə-skōp', tə-)
An apparatus that projects a series of images onto a screen at rapid speed to test visual perception, memory, and learning.

ta·chis'to·scop'ic (-skŏp'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for tachistoscope

Few English speakers likely know this word

Word Value for tachistoscope

Scrabble Words With Friends

Nearby words for tachistoscope