Medical Dictionary

smog

noun \ˈsmäg also ˈsmg\

Medical Definition of SMOG

:  a fog made heavier and darker by smoke and chemical fumes; also :  a photochemical haze caused by the action of solar ultraviolet radiation on atmosphere polluted with hydrocarbons and oxides of nitrogen especially from automobile exhaust
April 18, 2015
wimple Hear it
to veil, ripple, or meander
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears