tachistoscopeEnglishOxford Dictionary of Englishtachistoscope /taˈkɪstəskəʊp / ▸ noun an instrument used for exposing objects to the eye for a very brief measured period of time. – DERIVATIVES tachistoscopic /takɪstəˌˈskɒpɪk/ adjective tachistoscopically adverb– ORIGIN late 19th century: from Greek takhistos ‘swiftest’ + -scope.
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EnglishOxford Dictionary of English