The Open Dictionary

NOx

noun

UK/nɒks/
US/nɑːks/

Definitions of NOx noun

  1. Uncountableenvironment

    Nitrogen oxides, specifically nitric oxide and nitrogen dioxide, which are harmful gases produced during the combustion of fuels.

    • The factory is working to reduce its NOx emissions.

    • Automobile NOx emissions are a major source of urban air pollution.

    • New regulations require all power plants to lower their NOx output.