[ ta'kɪstəˌskəʊp ]
■ noun an instrument used for exposing objects to the eye for a very brief measured period of time.
Derivatives
tachistoscopic adjective
tachistoscopically adverb
Origin
C19: from Gk takhistos 'swiftest' + -scope .
TACHISTOSCOPE
Meaning of TACHISTOSCOPE in English
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004