Word:

Photochronograph

Pho`to`chron´o`graph
n.1.(Physics) An instrument for recording minute intervals of time. The record is made by the power of a magnetic field, due to an electric signaling current, to turn the plane of polarization of light. A flash, coinciding in time and duration with the signal, is thus produced and is photographed on a moving plate.
2.(Astron.) An instrument for the photographic recording of star transits.
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Photobiotic
Photoblepharon
Photoblepharon palpebratus
photocathode
photocell
Photoceramics
Photochemical
photochemical exchange
photochemical reaction
Photochemistry
Photochromic
Photochromography
Photochromoscope
Photochromotype
Photochromotypy
Photochromy
-- Photochronograph --
Photochronography
photocoagulation
photocoagulator
photoconduction
photoconductive
photoconductive cell
photoconductivity
photocopier
photocopy
Photodrome
Photodynamics
photoelectric
photoelectric cell
photoelectric emission
photoelectrical
photoelectrically
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