photochemical smog
Word Rarity
Very rare
Frequency: Zipf frequency 2.15 in modern English
34
Scrabble Score
17
Letters
6
Syllables
12
Unique Chars
Meaning
noun
Air pollution caused by photochemical reactions involving hydrocarbons, nitrogen oxides and other pollutants, especially in still air over cities.
Countable; Uncountable