UVB

noun

ˌyü-(ˌ)vē-ˈbē 

: 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

Previously, manufacturers had to mix multiple ingredients to protect against both UVA and UVB light. — ABC News, 14 Oct. 2026

Today’s top dermatologists and skin-care aficionados swear by the below SPFs to shield against UVA and UVB damage while keeping pores congestion-free. — Conçetta Ciarlo, Vogue, 13 Oct. 2026

This sheer mineral sunscreen also reflects UVA/UVB rays to protect skin and prevent sunburn, is water-resistant for up to 80 minutes, and is composed of zinc oxide for the ultimate sun protection. — Alison Abbey Hudak, Footwear News, 1 Sep. 2026

Wear sunscreen with at least SPF 30 every day to protect against both UVA and UVB rays to prevent more sun spots. — Helen Carefoot, Flow Space, 18 Aug. 2026

Word History

First Known Use

1975, in the meaning defined above

Medical Definition

UVB

noun

-ˈbē 

: 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