alethoscope

English

Etymology

From Ancient Greek ἀλήθεια (alḗtheia, “truth”) +‎ -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

• megalethoscope

 

References

• “alethoscope”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.