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Webster 1913 Edition
Cryolite
Cry′o-lite
(krī′?-l?t)
, Noun.
 [Gr. 
κρύοσ 
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. 
Webster 1828 Edition
Cryolite
CRYOLITE
,Noun.