spiegeleisen
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English
[edit]Etymology
[edit]From German Spiegeleisen (literally “mirror iron”).
Pronunciation
[edit]Noun
[edit]spiegeleisen (countable and uncountable, plural spiegeleisens)
- A ferromanganese alloy containing approximately 15% manganese and small quantities of carbon and silicon.
- Historically, spiegeleisen was the standard form in which manganese was traded and used in steelmaking.