stroboscope

 
Pronunciation: /ˈstrəʊbəskəʊp/

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

stroboscopic

Pronunciation: /-ˈskɒpɪk/
adjective

stroboscopically

Pronunciation: /-ˈskɒpɪk(ə)li/
adverb

Origin:

mid 19th century: from Greek strobos 'whirling' + -scope