: radiation that is in the region of the ultraviolet spectrum which extends from about 320 to 400 nm in wavelength and that causes tanning and contributes to aging of the skin

Word History

First Known Use

1975, in the meaning defined above

Time Traveler
The first known use of UVA was in 1975

Dictionary Entries Near UVA

Cite this Entry

“UVA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/UVA. Accessed 22 Feb. 2024.

Medical Definition

UVA

noun
: radiation that is in the region of the ultraviolet spectrum which is nearest to visible light and extends from about 320 to 400 nm in wavelength and that causes tanning and contributes to aging of the skin
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