Of or containing iron. / (chemistry) Of compounds of iron in which it has a valence or oxidation number of 2.

Alternative form of nonferrous

(dated, inorganic chemistry) Iron(II) sulfate.

Alternative form of ferrous sulfate

(chemistry) The chemical compound FeO, iron oxide where iron has a valence of +2.

(astrology) Pertaining to a type of asteroid, meteor, or comet, that contains mainly the carbon element and iron. / Being a certain type of metal alloy.

(inorganic chemistry) The binary sulfide of ferrous iron, FeS, that occurs in several minerals

(inorganic chemistry) An inorganic compound with the formula FeCl₂.