stroboscopePronunciation: /ˈstrəʊbəskəʊp/Definition of stroboscope noun Physics an instrument for studying periodic motion or determining speeds of rotation by shining a bright light at intervals so that a moving or rotating object appears stationary. a lamp made to flash intermittently, especially for this purpose. Derivatives stroboscopicPronunciation: /-ˈskɒpɪk/ adjective stroboscopicallyPronunciation: /-ˈskɒpɪk(ə)li/ adverb Origin: mid 19th century: from Greek strobos 'whirling' + -scopestroboscope in other Oxford dictionaries Definition of stroboscope in the US English dictionary