Hypertext Webster Gateway: "Nitratine"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Nitratine \Ni"tra*tine\, n. (Min.)
A mineral occurring in transparent crystals, usually of a
white, sometimes of a reddish gray, or lemon-yellow, color;
native sodium nitrate. It is used in making nitric acid and
for manure. Called also {soda niter}.
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