UVB

noun

ˌyü-(ˌ)vē-ˈbē How to pronounce UVB (audio)
: radiation that is in the region of the ultraviolet spectrum which extends from about 280 to 320 nm in wavelength and that is primarily responsible for sunburn, aging of the skin, and the development of skin cancer

Examples of UVB in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Made for sensitive skin, the Cocokind Silk SPF 30 Sunscreen is a reliable travel-friendly facial sunscreen that protects your face from both harmful UVA rays, which cause premature aging, and UVB rays, which cause skin to burn. — Caroline Hughes, Travel + Leisure, 31 July 2026 Keep a pair of sunglasses with UVA and UVB protection on hand to wear. — Health Editorial Team, Health, 29 July 2026 Zoltan says to look for sunglasses that protect against both UVA and UVB rays. — Helen Carefoot, Flow Space, 22 July 2026 The ingredient, which has been used in Europe and other countries for years, provides broad-spectrum protection against both UVA and UVB rays. — Kaitlyn Harvey, AJC.com, 17 July 2026 See All Example Sentences for UVB

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of UVB was in 1975

Browse Nearby Words

uvarovite
UVB
UVC
See all Nearby Words

Cite this Entry

“UVB.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/UVB. Accessed 6 Aug. 2026.

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Medical Definition

UVB

noun
-ˈbē How to pronounce UVB (audio)
: radiation that is in the region of the ultraviolet spectrum which extends from about 280 to 320 nm in wavelength and that is primarily responsible for sunburn, aging of the skin, and the development of skin cancer
Last Updated: - Updated example sentences
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