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photochemical

American

[foh-toh-kem-ik-uhl] / ˌfoʊ toʊˈkɛm ɪk əl /

adjective

relating to or produced by the chemical action of light.

photochemical British

/ ˌfəʊtəʊˈkɛmɪkəl /

adjective

of or relating to photochemistry; involving the chemical effects of light

"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

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photochemical

Not the good, high-altitude ozone that shields us from dangerous UV light, but bad ozone, hovering right above ground level — stinking, brownish, grayish photochemical smog.

From Los Angeles Times ● Mar. 26, 2026

But as we would find out, our smog — photochemical smog — made the air taste like poison and look like something you’d put out with the garbage.

From Los Angeles Times ● Mar. 26, 2026

This advancement broadens the possibilities for sustainable photochemical systems.

From Science Daily ● Nov. 26, 2025

Manganese is more than 100,000 times more common on Earth than ruthenium, yet it has rarely been used successfully in photochemical systems.

From Science Daily ● Nov. 26, 2025

The regular glass-tube mercury-arc is an efficient producer of the actinic rays and as a consequence has been extensively used in photographic work and in other photochemical processes.

From Artificial Light Its Influence upon Civilization by Matthew Luckiesh

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