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erythroscope

noun
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eryth·​ro·​scope | \ ə̇ˈrithrəˌskōp \

Definition of erythroscope

: a device consisting of overlapping yellow and blue glasses through which some shades of green appear red

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History and Etymology for erythroscope

International Scientific Vocabulary erythr- + -scope; originally formed as German erythroskop

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“Erythroscope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/erythroscope. Accessed 27 Feb. 2020.

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