Definify.com
Webster 1913 Edition
Hartshorn
Harts′hornˊ
(-hôrnˊ)
, Noun.
 1. 
The horn or antler of the hart, or male red deer. 
2. 
Spirits of hartshorn (see below); volatile salts. 
Hartshorn plantain 
(Bot.)
, an annual species of plantain (
Plantago Coronopus
); – called also buck’s-horn
. Booth. 
– Hartshorn shavings
, originally taken from the horns of harts, are now obtained chiefly by planing down the bones of calves. They afford a kind of jelly. 
Hebert. 
– Salt of hartshorn 
(Chem.)
, an impure solid carbonate of ammonia, obtained by the destructive distillation of hartshorn, or any kind of bone; volatile salts. 
Brande & C.
– Spirits of hartshorn 
(Chem.)
, a solution of ammonia in water; – so called because formerly obtained from hartshorn shavings by destructive distillation. Similar ammoniacal solutions from other sources have received the same name.
 Webster 1828 Edition
Hartshorn
H`ARTSHORN
,Noun.
  The jelly of hartshorn is simply gelatine; the earth remaining after calcination, is phosphate of lime; the salt and spirit of hartshorn are muriate of ammonia, with a little animal oil.
Hartshorn plantain, a species of Plantago.
Definition 2025
hartshorn
hartshorn
English
Noun
hartshorn (plural hartshorns)
- The antler of a hart, once used as a source of ammonia.
-  (dated) An aqueous solution of ammonia; smelling salts.
-  1749, Henry Fielding, The History of Tom Jones, a Foundling, Book IV, chapter xiv
- Sophia, who had tottered along with much difficulty, sunk down in her chair; but by the assistance of hartshorn and water, she was prevented from fainting away...
 
 
-  1749, Henry Fielding, The History of Tom Jones, a Foundling, Book IV, chapter xiv
Derived terms
Translations
An aqueous solution of ammonia
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Verb
hartshorn (third-person singular simple present hartshorns, present participle hartshorning, simple past and past participle hartshorned)
-  (transitive) To revive with hartshorn smelling salts.
-  Charles Dickens
- Accordingly, after a vast amount of moaning and crying up-stairs, and much damping of foreheads, and vinegaring of temples, and hartshorning of noses, and so forth […]
 
 
-  Charles Dickens