ferriferous
/fɛˈrɪf(ə)rəs/ /fəˈrɪf(ə)rəs/adjective
Producing or yielding iron; containing iron compounds or ore.
Origin
Late 18th century; earliest use found in Richard Kirwan (1733–1812), chemist and mineralogist. From ferri- + -ferous, originally rendering Swedish järnhaltig.