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spirit of hartshorn

noun, Chemistry
1.
a colorless, pungent, suffocating, aqueous solution of about 28.5 percent ammonia gas: used chiefly as a detergent, for removing stains and extracting certain vegetable coloring agents, and in the manufacture of ammonium salts.
Also, spirits of hartshorn.
Origin
1675-1685
1675-85
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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