OPTOGRAPHY

Op*tog"ra*phy, n. Etym: [Optic + -graphy.] (Physiol.)

Definition: The production of an optogram on the retina by the photochemical action of light on the visual purple; the fixation of an image in the eye. The object so photographed shows white on a purple or red background. See Visual purple, under Visual.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

25 June 2025

DETENTION

(noun) a state of being confined (usually for a short time); “his detention was politically motivated”; “the prisoner is on hold”; “he is in the custody of police”


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Coffee Trivia

Decaffeinated coffee is not caffeine-free. Studies from the National Institute of Health (US) have shown that virtually all decaf coffee types contain caffeine. A 236-ml (8-oz) cup of decaf coffee contains up to 7 mg of caffeine, whereas a regular cup provided 70-140 mg.

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