Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

English definition of “photochemical smog”

photochemical smog

noun [C or U]    
a fog caused by light from the sun shining on chemicals in the air produced by traffic and industryClouds, dew, fog and steamEnvironmental issuesRubbish and wasteProtection and protectors
(Definition of photochemical smog noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of photochemical smog

Translations of “photochemical smog”

Word of the Day

warm-up

something that you do to prepare yourself for an activity, especially gentle exercises before a physical activity

Word of the Day

Blog

Read our blog about how the English language behaves.

Learn More

New Words

Find words and meanings that have just started to be used in English, and let us know what you think of them.

Learn More