Dictionary  spir'it of harts'hornChem. 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,spir'its of harts'horn. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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