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UV-A

British

abbreviation

ultraviolet radiation with a range of 315–380 nanometres

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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.

Production of GlcHMS326 increases significantly when the cyanobacteria are exposed to UV-A, UV-B, and high salt conditions.

From Science Daily • Jan. 13, 2026

This substance is produced by heat-loving cyanobacteria when they are exposed to UV-A, UV-B, and salty conditions.

From Science Daily • Jan. 13, 2026

There are three types of UV light, each distinguished by their wavelengths: UV-A, UV-B, and UV-C.

From Textbooks • Sep. 6, 2018

Someone was carrying a UV-A "black light" that made them fluoresce.

From New York Times • Aug. 24, 2016

But then researchers discovered that UV-A, which has a longer wavelength than UV-B, does more than just promote wrinkles.

From Time Magazine Archive

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023