Wiktionary:Word of the day/June 19

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Word of the day for June 19
anomaloscope n
  1. (ophthalmology) An instrument used to test for color blindness by measuring quantitative and qualitative anomalies in color perception.
PointingHand.svg German physiologist Willibald A. Nagel, who invented the anomaloscope, was born on this day in 1870.

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