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TAKE THE QUIZ“ferrosoferric”
We have one entry that includes the term ferrosoferric.
ferrosoferric oxide
noun: a black magnetic iron oxide Fe3O4 found in nature as magnetite, also obtained synthetically (as from iron by heating in steam or from a ferrous salt and an alkali by precipitation and oxidation), and used chiefly as a pigment and polishing material
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Merriam-Webster unabridged
