tachistoscopePronunciation: /taˈkɪstəˌskəʊp/Definition of tachistoscope noun an instrument used for exposing objects to the eye for a very brief measured period of time. Derivatives tachistoscopicPronunciation: /-ˈskɒpɪk/ adjective tachistoscopically adverb Origin: late 19th century: from Greek takhistos 'swiftest' + -scopetachistoscope in other Oxford dictionaries Definition of tachistoscope in the US English dictionary
