Is Tachistoscopically a Word?

An apparatus that projects a series of images onto a screen at rapid speed to test visual perception, memory, and learning. [Greek takhistos, superlative of takhus, swift + -scope.] ta·chis′to·scop′ic (-skŏp′ĭk) adj.

What does tachistoscope mean?

: an apparatus for the brief exposure of visual stimuli that is used in the study of learning, attention, and perception.

How do you spell tachistoscope?

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.