English

ferrous oxide

ferrous + oxide

A compound of ferrous + oxide

Old Latin *fersom

Latin ferrum ‘iron’

Latin ferreus ‘iron, made of iron’

Proto-Indo-European *h₂eḱ- ‘sharp’

French oxyde

English oxide

Today it means

noun The chemical compound FeO, iron oxide where iron has a valence of +2.

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

Etymograph / ferrous oxide