nitrogen dioxide
Word Rarity
Rare
Frequency: Zipf frequency 3.48 in modern English
25
Scrabble Score
15
Letters
5
Syllables
9
Unique Chars
Meaning
noun
The binary compound NO₂, a brownish gas that is a poisonous air pollutant; it exists in equilibrium with dinitrogen tetroxide. It can be the poisonous result of a nitric acid spill contacting ambient air.
Uncountable