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Webster 1913 Edition
Anhydrite
An-hy′drite
,Noun.
[See
Anhydrous
.] (Min.)
A mineral of a white or a slightly bluish color, usually massive. It is anhydrous sulphate of lime, and differs from gypsum in not containing water (whence the name).
Webster 1828 Edition
Anhydrite
AN'HYDRITE
,Noun.
A species of sulphate of lime, anhydrous gypsum, of which there are several varieties; compact, granular, fibrous, radiated, sparry, siliciferous or vulpinite, and convoluted.