spiegeleisen
English
editEtymology
editFrom German Spiegeleisen (literally “mirror iron”).
Pronunciation
editNoun
editspiegeleisen (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.