spiegel iron Meaning, Definition & Usage

  1. noun pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel
    spiegeleisen; spiegel.

WordNet

Spie"gel i`ron
Etymology
G. spiegel mirror + E. iron.
Definitions
  1. (Metal.) A fusible white cast iron containing a large amount of carbon (from three and a half to six per cent) and some manganese. When the manganese reaches twenty-five per cent and upwards it has a granular structure, and constitutes the alloy ferro manganese, largely used in the manufacture of Bessemer steel. Called also specular pig iron, spiegel, and spiegeleisen.

Webster 1913