† manganeisenn.
Engineering. Obsolete.
An alloy of iron containing manganese.An alloy containing between 15 and 30 per cent manganese is usually called spiegeleisen or spiegel; one containing a higher proportion of manganese (usually about 80 per cent) is more commonly called ferromanganese.
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ferromanganese1864
manganeisen1881
ferro-alloy1888
silico-manganese1895
Mumetal1924
1881 Encycl. Brit. XIII. 350/2 The preparation of Manganeisen (as such substances may be conveniently termed) is an important step in the steel making process...The richer manganeisens (containing 15 per cent. and upward of manganese) used for crucible steels were themselves prepared in crucibles.
This entry has been updated (OED Third Edition, September 2000; most recently modified version published online December 2018).
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