Hartshorn \Harts"horn`\ (-h[^o]rn`), n. 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.