Magnetite
Pronunciation : Mag"net*ite
Part of Speech : n.
Definition : Defn: An oxide of iron (Fe3O4) occurring in isometric crystals, also massive, of a black color and metallic luster. It is readily attracted by a magnet and sometimes possesses polarity, being then called loadstone. It is an important iron ore. Called also magnetic iron.
(Min.)
Source : Webster's Unabridged Dictionary, 1913