noun
: a native compound of iron (as hematite, limonite, magnetite, siderite, goethite, and the bog and clay iron ores) from which the metal may be profitably extracted
noun
: a native compound of iron (as hematite, limonite, magnetite, siderite, goethite, and the bog and clay iron ores) from which the metal may be profitably extracted
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012