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See more synonyms for hartshorn on Thesaurus.com
  1. the antler of a hart, formerly used as a source of ammonia.
  2. ammonium carbonate.
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Origin of hartshorn

before 1000; Middle English hertis horn, Old English heortes horn. See hart, 's1, horn
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for hartshorn


  1. an obsolete name for sal volatile (def. 2)
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Word Origin

Old English heortes horn hart's horn (formerly a chief source of ammonia)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hartshorn


"ammonium carbonate," Old English heortes hornes, from hart + horn (n.). So called because a main early source of ammonia was the antlers of harts.

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Online Etymology Dictionary, © 2010 Douglas Harper