English Explanatory Dictionary

photochronograph

English dictionary entry

Meanings

noun
  1. An instrument for recording very short 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. An instrument for the photographic recording of star transits.

Word forms

photochronograph photochronographs

Etymology

From photo- + chronograph.

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