imp. & p. p. of Spy. [ 1913 Webster ]
‖n. [ G. spiegel mirror + eisen iron. ] See Spiegel iron. [ 1913 Webster ]
[ G. spiegel mirror + E. iron. ] (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