noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A ferromanganese alloy containing approximately 15% manganese and small quantities of carbon and silicon. countable, uncountable

   "Historically, spiegeleisen was the standard form in which manganese was traded and used in steelmaking."

2. 2
   pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel wordnet

Synonyms

All synonyms

alloyspiegelspiegel iron

Example

More examples

"Historically, spiegeleisen was the standard form in which manganese was traded and used in steelmaking."

Etymology

From German Spiegeleisen (literally “mirror iron”).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.