: 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
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All are broad-spectrum, providing both UVA and UVB protection. Laia Farran Graves, Forbes.com, 14 Aug. 2025 The lenses come with protection from UVA and UVB rays. Christopher Murray May Earn A Commission If You Buy Through Our Referral Links. This Content Was Created By A Team That Works Independently From The Fox Newsroom., FOXNews.com, 13 Aug. 2025 Now 45% off Amazon Neutrogena Sport Face Sunscreen SPF 70+, Oil-Free Facial Sunscreen Lotion with Broad Spectrum UVA/UVB Sun Protection, Sweat-Resistant & Water-Resistant, 2.5 fl. Kelsey Chapman, ABC News, 25 Mar. 2024 What to Look for in Sunscreens UVA and UVB Protection First and foremost, the best sunscreens offer broad-spectrum coverage (both UVA and UVB). Christian Gollayan, menshealth.com, 10 May 2023

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of UVB was in 1975

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Cite this Entry

“UVB.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/UVB. Accessed 10 Sep. 2025.

Medical Definition

UVB

noun
: 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
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