Source : Webster's Revised Unabridged Dictionary (1913)

Fahlerz \Fahl"erz\, Fahlband \Fahl"band\, n. [G. fahlerz; fahl
   dun-colored, fallow + erz ore.] (Min.)
   Same as {Tetrahedrite}.

Fahlband \Fahl"band`\, n. [G., fr. fahl dun-colored + band a
   band.] (Mining)
   A stratum in crystalline rock, containing metallic sulphides.
   --Raymond.