pho·​to·​chem·​i·​cal | \ ˌfō-tō-ˈke-mi-kəl How to pronounce photochemical (audio) \

Definition of photochemical

1 : of, relating to, or resulting from the chemical action of radiant energy and especially light photochemical smog
2 : of or relating to photochemistry photochemical studies

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Other Words from photochemical

photochemically \ ˌfō-​tō-​ˈke-​mi-​k(ə-​)lē How to pronounce photochemically (audio) \ adverb

Examples of photochemical in a Sentence

Recent Examples on the Web

The light produced as these meteors streak into our atmosphere at over 130,000 miles a second, way faster than a bullet out of a gun, is due to photochemical reactions. Mike Lynch, Twin Cities, "Sky Watch: Don’t wait for its peak to look for the Perseid meteor shower," 11 Aug. 2019 Some methane comes from photochemical reactions in their foliage. Fred Pearce, WIRED, "Trees Emit a Surprisingly Large Amount of Methane," 9 July 2019 He co-produced, and appeared in, the 2012 documentary Side By Side, an exploration of the differences between traditional photochemical filmmaking and digital processes. Time, "Why It Took Keanu Reeves 30 Years to Become an Overnight Sensation," 21 June 2019 By the end of the 1700s, scientists had realized that silver chloride and silver nitrate would darken when exposed to light, a photochemical effect that would soon make photography possible. Jennifer Ouellette, Ars Technica, "Scientists found these old photographs contain metallic nanoparticles," 12 June 2019 By comparison, our standard contact printers for photochemical preservation run at 80 frames per second (fps). Chuck Thompson, Popular Mechanics, "How Archivists Saved Damaged WWII Film for 'The Cold Blue'," 23 May 2019 The photochemical restoration edition will be available on DVD and Blu-ray this fall. Michael Phillips,, "Christopher Nolan's mission with '2001': Beyond the infinite, back to analog," 9 May 2018 The re-release of the 50-year-old film was accomplished through an entirely photochemical process overseen by Christopher Nolan. Charles Champlin,, "'2001: A Space Odyssey' still blowing minds 50 years later," 17 May 2018 Scientists say rising temperatures from climate change will make smog tougher to control by boosting the photochemical reactions that generate ozone pollution. Tony Barboza,, "Slowdown in emissions reductions could explain stalled progress on smog, study finds," 30 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'photochemical.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of photochemical

1857, in the meaning defined at sense 1

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Statistics for photochemical

Last Updated

28 Aug 2019

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Time Traveler for photochemical

The first known use of photochemical was in 1857

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More Definitions for photochemical


pho·​to·​chem·​i·​cal | \ ˌfōt-ō-ˈkem-i-kəl How to pronounce photochemical (audio) \

Medical Definition of photochemical

1 : of, relating to, or resulting from the chemical action of radiant energy and especially light photochemical smog
2 : of or relating to photochemistry photochemical studies

Other Words from photochemical

photochemically \ -​k(ə-​)lē How to pronounce photochemically (audio) \ adverb

More from Merriam-Webster on photochemical

Rhyming Dictionary: Words that rhyme with photochemical

Comments on photochemical

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fear of the number 13

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