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 spirits of harts·horn /-ˈhɑrtsˌhɔ(ə)rn/ 名詞

 am·mo·ni·a n.  Chem. A gaseous compound of hydrogen and nitrogen, NH3, with a pungent smell and taste: -- often called volatile alkali, and spirits of hartshorn.  It is very soluble in water, forming a moderately alkaline solution, and is used in aqueous solution as a household cleaning agent, such as for cleaning grease from glass.
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 Harts·horn 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.
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