photochronograph en · NOUN
Etymology
From photo- + chronograph.
Meanings
- 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.
- An instrument for the photographic recording of star transits.
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| photochronographs | Number=Plur | lexicographic |