an apparatus that exposes words, pictures, etc. for a measured fraction of a second, used to increase reading speed or to test memory, perception, etc.
Origin of tachistoscope; from Classical Greek tachistos, superlative of tachys, swift (see tachy-) + -scope
An apparatus that projects a series of images onto a screen at rapid speed to test visual perception, memory, and learning.
Origin of tachistoscopeGreek takhistos, superlative of takhus, swift + –scope.