Source : Webster's Revised Unabridged Dictionary (1913)

Speiss \Speiss\, n. (Metal.)
   Impure metallic arsenides, principally of iron, produced in
   copper and lead smelting.

Speiss \Speiss\, n. [Cf. G. speise food, mixed metal for bells,
   etc.] (Metal.)
   A regulus consisting essentially of nickel, obtained as a
   residue in fusing cobalt and nickel ores with silica and
   sodium carbonate to make smalt.