PURPOSELESS
\pˈɜːpəsləs], \pˈɜːpəsləs], \p_ˈɜː_p_ə_s_l_ə_s]\
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By Princeton University
By DataStellar Co., Ltd
By Daniel Lyons
By Stormonth, James, Phelp, P. H.
Word of the day
Ultraviolet Ray
- That portion electromagnetic spectrum immediately below visible range extending into x-ray frequencies. longer near-biotic vital necessary for endogenous synthesis of vitamin D and are also called antirachitic rays; the shorter, ionizing wavelengths (far-UV or abiotic extravital rays) viricidal, bactericidal, mutagenic, carcinogenic used as disinfectants.