nox meaning: definition, etymology and quotations

nox

nounalso spelled NOx

Etymology Learned borrowing from Latin nox, from Proto-Italic *nokts, from Proto-Indo-European *nókʷts.

The period of darkness in each twenty-four hours; a night.

noun

/ɛn əʊ ˈɛks/

Etymology From N (“nitrogen”) + O (“oxygen”) + x (“x substitution value”).

Chemistry, Natural sciences, Physical sciences Any of the various nitrogen oxides produced during combustion.

"The NOx and particulate reductions provide clean air in the cities and communities we serve. [...]"2020 December 16, Daniel Puddicombe, “Treated DMUs become greener and cleaner”, in Rail, page 46:

noun

Etymology From Latin nox (“night; darkness”), by analogy with lux from Latin lūx (“light; daylight, day”). Doublet of night.

Rare millilux (unit of illuminance)

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — authors: page histories for nox and NOx.