chronos
"Our concept of time has been changed by the work of chronophotographers as it has done to those living in the era. Chronophotography is the name Étienne-Jules Marey (1882) uses to describe the time (chronos) photographs of movement sequences. For Marey his chronophotographs are a means to dissect, otherwise invisible stages of movement, for study. This is also true for the other chronophotographers although not always purely scientific."