photochronograph

noun
pho·​to·​chronograph | \¦fōt(ˌ)ō+\

Definition of photochronograph 

1 : chronophotograph also : an apparatus for taking chronophotographs

2 : an instrument for the photographic recording of star transits

3 : an instrument for recording minute intervals of time photographically

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History and Etymology for photochronograph

International Scientific Vocabulary phot- + chronograph; perhaps originally formed in French

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