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Ultraviolet radiation that is found in sunlight, has a wavelength between 290 and 320 nanometers, and can cause damage to the skin including sunburn, tanning, premature aging, and cancer.
[u(ltra)v(iolet) B (the letter B being used to designate the second of the categories based on wavelength in which ultraviolet radiation is classified).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
UVBUV-B ADJ ABBR UVB rays → rayos mpl UVB
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005