n.
Pronunciation: ' sp ē -g ə - ˌ l ī -z ə n
Variant: also spie · gel \ ' sp ē -g ə l \
Function: noun
Etymology: German Spiegeleisen, from Spiegel mirror + Eisen iron
Date: 1855
: a composition of iron that contains 15 to 30 percent manganese and 4.5 to 6.5 percent carbon