GNU Collaborative International Dictionary of English

last match results

Found one definition

1.       
   Magnetite , n. (Min.) 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.
   1913 Webster