ultraviolet ray; invisible electromagnetic radiation with a wavelength shorter than that of visible light, used for sterilization and medical treatment but harmful to eyes in large amounts; also called [[紫外光|紫外光|zi3 wai4 guang1]]

Electromagnetic radiation with a wavelength shorter than visible light, used for sterilization and medical treatment; also called [[紫外线|紫外線|zi3 wai4 xian4]].

ultraviolet light; radiation beyond the violet end of the visible spectrum