nox

noun

1. The period of darkness in each twenty-four hours; a night.
2. (rare)millilux (unit of illuminance)
3. (alt-of, alternative, uncountable)Alternative form of NOx (nitrogen oxides)
4. (abbreviation, alt-of, uncountable)Abbreviation of nitrous oxide (“N₂O”).

   “Near-synonym: nos”

5. Any of the various nitrogen oxides produced during combustion.

   “"The NOx and particulate reductions provide clean air in the cities and communities we serve. [...]"”

6. (alt-of, alternative, uncountable)Alternative form of nox (“nitrous oxide”).

name

1. (Roman)The Roman goddess of night.