Deep Ultraviolet
Of or relating to electromagnetic radiation between violet visible light and x-rays in the electromagnetic spectrum, having frequencies between 790 terahertz and 30 petahertz and wavelengths between 380 nanometers and 10 nanometers. (American Heritage® Dictionary 2011)
Sources
Deep ultraviolet. (n.d.) American Heritage® Dictionary of the English Language, Fifth Edition. (2011). Retrieved June 7 2021 from https://www.thefreedictionary.com/Deep+ultraviolet