Ohcanbohtosat

ultraviolet radiation: form of electromagnetic radiation

ultraviolet–visible spectroscopy: refers to absorption spectroscopy or reflectance spectroscopy in part of the ultraviolet and the full, adjacent visible spectral regions

ultraviolet germicidal irradiation: disinfection method that uses short-wavelength ultraviolet light to kill or inactivate microorganisms

photokeratitis: Eyes with no protection to the UV rays

ultraviolet index: measurement of strength of sunburn-producing ultraviolet (UV) radiation

ultraviolet astronomy: observational astronomy performed over the ultraviolet range from 10 nm to 400 nm

ultraviolet catastrophe: classical physics prediction that black body radiation grows unbounded with frequency