UVB
Americannoun
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Zinc oxide is widely used in mineral sunscreen because it blocks UVA rays, which contribute to skin aging, as well as UVB rays, which cause sunburn and increase the risk of skin cancer.
From Science Daily ● Jul. 20, 2026
At SPF 30, a sunscreen already blocks 97% of UVB rays.
From The Wall Street Journal ● Jul. 3, 2026
Like sunlight, the lamps emit two different types of ultraviolet wavelengths: UVA, which are longer and penetrate more deeply into the skin, and UVB, which are shorter and more easily burn the outer layers.
From Los Angeles Times ● May 6, 2026
While some sunbeds may technically emit UVB rays, which the body can convert into vitamin D, the WHO says they are not an efficient way to make the nutrient.
From BBC ● Feb. 11, 2026
Longer-wavelength UVA rays penetrate deeper into the skin than shorter-wavelength UVB rays, although both types are known to cause skin cancer.
From Scientific American ● Sep. 6, 2023
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
