ˈspēgəˌlīz ə n noun
also spie·gel or spiegel iron
( -s )
Etymology: spiegeleisen from German, from spiegel mirror (from Old High German spiagal, from Latin speculum ) + eisen iron, from Old High German īsan; spiegel short for spiegeleisen; spiegel iron part translation of German spiegeleisen — more at speculum , iron
: a variety of pig iron containing 15 to 30 percent manganese and 4.5 to 6.5 percent carbon and used in steelmaking to recarburize and deoxidize the molten metal of the Bessemer converter or the open-hearth furnace — called also mirror iron ; compare ferromanganese