photochromic
adjective
pho·to·chro·mic
ˌfō-tə-ˈkrō-mik 
1
: capable of changing color on exposure to radiant energy (such as light)
photochromic glass
2
: of, relating to, or utilizing the change of color shown by a photochromic substance
a photochromic process
Examples of photochromic in a Sentence
Recent Examples on the Web
Factor in the versatile photochromic lenses—transition lenses that adapt to the conditions at hand—and these are a must-have accessory for us on sunset rides.
—
Drew Zieff, Outside Online, 26 June 2025
Conventional photochromic lenses like Transitions can take minutes shifting under different levels of sunlight, and have no direct user control.
—PC Magazine, 17 Apr. 2025
Some models have a dozen different lens options, including photochromic and polarized technology.
—Maggie Slepian, Travel + Leisure, 24 Jan. 2025
Priced at $299 (or $349 for photochromic lenses), the Engo 2 essentially takes data from your Garmin bike computer, watch, or fitness tracker; Apple Watch; Android Wear device, Suunto watch, or ActiveLook's homegrown app and projects it toward the top inside part of the right lens.
—Eric Bangeman, Ars Technica, 12 Sep. 2024
See All Example Sentences for photochromic
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Drew Zieff, Outside Online, 26 June 2025
Conventional photochromic lenses like Transitions can take minutes shifting under different levels of sunlight, and have no direct user control.
—PC Magazine, 17 Apr. 2025
Some models have a dozen different lens options, including photochromic and polarized technology.
—Maggie Slepian, Travel + Leisure, 24 Jan. 2025
Priced at $299 (or $349 for photochromic lenses), the Engo 2 essentially takes data from your Garmin bike computer, watch, or fitness tracker; Apple Watch; Android Wear device, Suunto watch, or ActiveLook's homegrown app and projects it toward the top inside part of the right lens.
—Eric Bangeman, Ars Technica, 12 Sep. 2024
See All Example Sentences for photochromic
Cite this Entry
“Photochromic.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/photochromic. Accessed 24 Jul. 2025.
Copy CitationMedical Definition
photochromic
1 of 2 adjective
pho·to·chro·mic
ˌfōt-ə-ˈkrō-mik
1
: capable of changing color on exposure to radiant energy (as light)
eyeglasses with photochromic lenses
2
: of, relating to, or utilizing the change of color shown by a photochromic substance
a photochromic process
photochromic
2 of 2 noun
: a photochromic substance
—usually used in plural
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