ultraviolet
adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-(ə-)lət 
1
: situated beyond the visible spectrum at its violet end
—used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2
: relating to, producing, or employing ultraviolet radiation
ultraviolet
noun
Examples of ultraviolet in a Sentence
Recent Examples on the Web
While its spiral arms stand out in visible light, the arms look like rings when viewed in ultraviolet light.
—
Miguel Claro, Space.com, 23 Apr. 2025
Agglomerates of cells are shielded from everything from harmful chemicals to ultraviolet light to desiccation.
—Carrie Arnold, Quanta Magazine, 21 Apr. 2025
Under ultraviolet light, certain areas of the cave transform into something otherworldly.
—David Bressan, Forbes.com, 17 Apr. 2025
The same goes for ultraviolet light rays from the sun.
—Seraphina Seow, Outside Online, 9 Apr. 2025
See All Example Sentences for ultraviolet
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Miguel Claro, Space.com, 23 Apr. 2025
Agglomerates of cells are shielded from everything from harmful chemicals to ultraviolet light to desiccation.
—Carrie Arnold, Quanta Magazine, 21 Apr. 2025
Under ultraviolet light, certain areas of the cave transform into something otherworldly.
—David Bressan, Forbes.com, 17 Apr. 2025
The same goes for ultraviolet light rays from the sun.
—Seraphina Seow, Outside Online, 9 Apr. 2025
See All Example Sentences for ultraviolet
Cite this Entry
“Ultraviolet.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ultraviolet. Accessed 1 May. 2025.
Copy CitationKids Definition
ultraviolet
adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-ə-lət
1
: located beyond the visible spectrum at its violet end and having a wavelength shorter than those of visible light but longer than those of X-rays
2
: relating to, producing, or using ultraviolet radiation
ultraviolet
noun
Medical Definition
ultraviolet
1 of 2 adjective
ul·tra·vi·o·let
ˌəl-trə-ˈvī-(ə-)lət
1
: situated beyond the visible spectrum at its violet end
—used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2
: relating to, producing, or employing ultraviolet radiation
ultraviolet
2 of 2 noun
: ultraviolet radiation
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