Ferrous
Ferrous is an adjective coming from the Latin ferrum (iron). One uses this word to indicate the presence of iron, mostly in metallurgy or related industries. There are also non-ferrous metals, which are metals that have no iron in them at all.
Ferrous can also refer to iron in its +2 oxidation state.
"Ferrous" is also the name of a song by Peter Gabriel.
Ferrous Media
Ferrous oxide is more correctly called iron(II) oxide.
Pourbaix diagram of aqueous iron
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