Definition of "ultraviolet light" []

• Light in the ultraviolet part of the spectrum. (noun)
• Light bulb that emits ultraviolet light; see black light. (noun)

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• "There was I, frantically trying to tell Maria about the engravings on the Jacobite drinking glasses in the town museum, and of the really serious need for ultraviolet light to distinguish between the fluorescence that demonstrates a glass's origin, and there she was nodding encouragement as I ballsed up my declensions time and again."