alethoscope

English

Etymology

From Ancient Greek ἀλήθεια (alḗtheia, “truth”) +‎ -scope, equivalent to aletho- +‎ -scope.

Noun

alethoscope (plural alethoscopes)

  1. (historical) An instrument, invented in the 1860s, for viewing magnified pictures by means of a single lens inside a box. By varying the intensity of the light, the same picture can be shown as "daytime" or "nighttime".

Derived terms

References

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