spiegeleisen
noun
spie·gel·ei·sen
| \ ˈspē-gə-ˌlī-zᵊn
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variants:
or less commonly spiegel \ ˈspē-gəl
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Definition of spiegeleisen
: a composition of iron that contains 15 to 30 percent manganese and 4.5 to 6.5 percent carbon
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