English

hyponitrous

From hypo- + nitrous.

A compound of hypo- + nitrous

Proto-Indo-European *upó ‘under, below’

Ancient Greek ὑπό ‘under’

English hypo-

Ancient Greek νῐ́τρον ‘sodium carbonate, sodium nitrate or potassium…’

Latin nitrum ‘various alkalis’

Latin nitrōsus ‘nitrose’

Middle French nitreux

Today it means

adj Of or pertaining to hyponitrous acid or its derivatives

Language periods are conventional ranges, not dates for this word.

Etymograph / hyponitrous