Medical Definition of Ultraviolet rays

1. That portion of the electromagnetic spectrum immediately below the visible range and extending into the X-ray frequencies. The longer wavelengths (near-uv or biotic or vital rays) are necessary for the endogenous synthesis of vitamin d and are also called antirachitic rays; the shorter, ionizing wavelengths (far-uv or abiotic or extravital rays) are viricidal, bactericidal, mutagenic, and carcinogenic and are used as disinfectants. (12 Dec 1998)

Lexicographical Neighbors of Ultraviolet Rays

ultraviolent
ultraviolet
ultraviolet
ultraviolets
ultraviolet A
ultraviolet B
ultraviolet C
ultraviolet illumination
ultraviolet keratoconjunctivitis
ultraviolet lamp
ultraviolet lamp
ultraviolet light
ultraviolet microscope
ultraviolet radiation
ultraviolet radiation
ultraviolet rays (current term)
ultraviolet source
ultraviolet spectrum
ultraviolet spectrum
ultraviolet therapy
ultravirile
ultravirilities
ultravirility
ultravirus
ultrawide
ultrazodiacal
ultra vires
ultromotivity
ultropaque method
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