ultraviolet /ul-trə-vīˈə-lit/ (physics)

1. Beyond the violet end of the visible spectrum, of wavelength between approx 400 and 10 nanometres
2. Relating to, or using, radiations of wavelengths less than those of visible light

ultraviolet spectroscopy noun (chem)

The study of material by its absorption of ultraviolet radiation

ultraviolet star noun

One of a class of invisible stars giving out intense ultraviolet radiation

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