Source : Webster's Revised Unabridged Dictionary (1913)

Cryolite \Cry"o*lite\ (kr[imac]"?-l?t), n. [Gr. kry`os icy cold,
   frost + -lite: cf. F. cryolithe.] (Min.)
   A fluoride of sodium and aluminum, found in Greenland, in
   white cleavable masses; -- used as a source of soda and
   alumina.

Source : WordNet®

cryolite
     n : a white mineral consisting of fluorides of aluminum and
         sodium; a source of fluorine [syn: {Greenland spar}]