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.
Sunglasses for your little one can protect their eyes and reduce glare—just make sure that the label states that the lenses block at least 99% of ultraviolet (UVA and UVB) radiation. — Nancy Mattia, Parents, 8 July 2026 Sun Bum Sunscreen Lotion not only shields against UVA and UVB rays but also moisturizes at the same time. — Bestreviews, Mercury News, 29 June 2026 Bemotrizinol protects against both UVA and UVB rays. — Stephanie Brown, Verywell Health, 25 June 2026 Scientists used to think only UVB was harmful because UVB rays cause sunburns. — Guy German, Fortune, 21 June 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 15 Jul. 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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