Webster's Online Dictionary
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Definition: DIRADIATION

Part of Speech Definition
Noun 1. The emission and diffusion of rays of light.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "Diradiation" was first used in popular English literature: sometime before 1914. (references)

Note: Diradiation \Di*ra`di*a"tion\, noun. [Prefix di- radiation.]. (references)

Definition: DIRADIATION

Part of SpeechDefinition
Noun1. The emission and diffusion of rays of light.[Websters].

Source: Webster's Revised Unabridged Dictionary (1913)

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Date "DIRADIATION" was first used in popular English literature: sometime before 1914. (references)

Note: Diradiation \Di*ra`di*a"tion\, noun. [Prefix di- radiation.]. (references)