You searched for: “photochronograph
photochronograph (s) (noun), photochronographs (pl)
An instrument for taking a series of instantaneous photographs at regular short intervals of time, also each of the photographs so taken: A photochronograph is a device by which a beam of light is caused to produce a photographic image at some precise instant of time, for example, so as to show the exact time at which a star crosses the meridian.
This entry is located in the following units: chrono-, chron- (page 9) photo-, phot-, -photic (page 6)