photochemical smog

noun, Meteorology
1.
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.
Also called oxidant smog, smog.
Origin
1957; photo- + chemical
Examples from the web for photochemical smog
  • The dark region over the sunlit pole is believed to be a high layer of photochemical smog.
  • The kinetics and mechanisms of the homogeneous elementary reactions involved in photochemical smog formation were investigated.
photochemical smog in Medicine

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

photochemical smog in Science
photochemical smog
  (fō'tō-kěm'ĭ-kəl)   
See smog.