Source : Webster's Revised Unabridged Dictionary (1913)

Sphalerite \Sphal"er*ite\, n. [Gr. ??? slippery, uncertain. See
   {Blende}.] (Min.)
   Zinc sulphide; -- called also {blende}, {black-jack}, {false
   galena}, etc. See {Blende}
   (a) .

Source : WordNet®

sphalerite
     n : an ore that is the chief source of zinc; consists largely of
         zinc sulfide in crystalline form [syn: {zinc blende}, {blende}]