a hard, white pig iron containing 15 to 32% manganese
also spie′gel or spiegel iron
Origin of spiegeleisenGerman from spiegel, mirror ( from Old High German spiagal from Classical Latin speculum: see speculum) + eisen, iron
An alloy of iron containing approximately 15 percent manganese and small quantities of carbon and silicon, used in the Bessemer process.
Origin of spiegeleisenGerman Spiegel mirror ( from Middle High German) ( from Old High German spiagal ) ( from Latin speculum ; see speculum . ) Eisen iron ( from Middle High German īsen ) ( from Old High German īsan ; see eis- in Indo-European roots.)
German, literally "mirror-iron".