Definition of ferrosoferric oxide in English:

ferrosoferric oxide

noun

Chemistry
  • A black oxide of iron containing the element in both the ferrous and ferric states (oxidation numbers +2 and +3), which occurs especially as the mineral magnetite or lodestone, has ferrimagnetic properties, and is made artificially for use as a black pigment.

Origin

Early 19th century; earliest use found in Thomas Thomson (1773–1852), chemist.