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spiegeleisen

[spee-guh l-ahy-zuh n]
noun
  1. a lustrous, crystalline pig iron containing a large amount of manganese, sometimes 15 percent or more, used in making steel.
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Origin of spiegeleisen

1865–70; < German, equivalent to Spiegel mirror + Eisen iron
Also called spie·gel, spiegel iron.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for spiegel

spiegeleisen

noun
  1. a type of pig iron that is rich in manganese and carbon
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Word Origin

C19: German, from Spiegel mirror + Eisen iron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012