photochemical smog

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noun Meteorology.

air pollution containing ozone and other reactive chemical compounds formed by the action of sunlight on nitrogen oxides and hydrocarbons, especially those in automobile exhaust.

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Also called oxidant smog, smog.

Origin of photochemical smog

First recorded in 1957; photo- + chemical

Words nearby photochemical smog

photocatalysis, photocatalyst, photocathode, photocell, photochemical, photochemical smog, photochemistry, photochemotherapy, photochromic, photochromic lens, photochromy

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use photochemical smog in a sentence

The smog will return quickly as factories try to double their production to make up for lost time.
Obama and Xi Jinping Say They’ll Work Together to Save Environment|Ben Leung|November 12, 2014|DAILY BEAST
The authorities claim that this move is one of the measures that will curb the persistent smog that plagues the capital.
The Chinese Can’t Catch Their Breath|Brendon Hong|May 5, 2014|DAILY BEAST
Even though sales have increased dramatically as smog is becoming the norm, they represent a significant investment.
The Chinese Can’t Catch Their Breath|Brendon Hong|May 5, 2014|DAILY BEAST
The officials of Guizhou are not the only ones to take advantage of smog-riddled northern skies.
The Chinese Can’t Catch Their Breath|Brendon Hong|May 5, 2014|DAILY BEAST

As the smog that was “Juanuary” lifts, we can finally digest what happened in Vietnam.
Juan Pablo Has Ruined ‘The Bachelor’|Brandy Zadrozny|February 11, 2014|DAILY BEAST
We must therefore conclude that the heliotropic curvature of the polyps is determined by a photochemical action of the light.
The Organism as a Whole|Jacques Loeb
The product of photochemical decomposition no longer forms azo-colours with amines or phenols.
Coal|Raphael Meldola
Harsh sunlight pierced the smog and he felt his eyes watering.
This Crowded Earth|Robert Bloch
It was like bathing in air, washing away the smog of those long days of imprisonment.
Star Born|Andre Norton
Scheele's work aroused much interest in photochemical effects and many investigations followed.
Artificial Light|M. Luckiesh

Medical definitions for photochemical smog

photochemical smog

Air pollution produced by the action of sunlight on hydrocarbons, nitrogen oxides, and other pollutants.

Scientific definitions for photochemical smog

photochemical smog

[ fō′tō-kĕm′ĭ-kəl ]

See smog.