the antler of a hart, formerly used as a source of ammonia.
Origin of hartshorn
before 1000; Middle English hertis horn, Old English heortes horn.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for hartshorn
Historical Examples of hartshorn
Cloths thus saturated with hartshorn powder, are also the best things for cleaning brass locks, and the finger plates of doors.
Ryder, who was prowling about, found her there, and fetched her hartshorn.
But talk with Celsus, Celsus will advise Hartshorn, or something that shall close your eyes.
If there be stains in the articles, take them out with spirits of hartshorn.
Patty, with pale face and lips compressed, ran to fetch the hartshorn.
British Dictionary definitions for hartshorn
Word Origin for hartshorn
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
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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.
Online Etymology Dictionary, © 2010 Douglas Harper