Definitions
1.nounThe interstitial solid solution of carbon in body-centered cubic iron.
2.nounAny of a class of metal oxides which show ferrimagnetism; used in transformers, inductors, antennas, recording heads, microwave devices, motors and loudspeakers.
3.nounThe anion FeO22-, and any of the salts (formally derived from the unknown ferrous acid) derived from it.