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a white, crystalline, water-soluble powder, NH 4 NO 3 , usually produced by reacting nitric acid with vaporous ammonia: used chiefly in explosives, fertilizers, freezing mixtures, and in the manufacture of nitrous oxide.
Contemporary Examples

ammonium nitrate is extremely common, and pretty dangerous, and also extremely useful.
The Most Dangerous Substance in America May Be Fertilizer Megan McArdle April 18, 2013

Historical Examples

Poudre Blanche Cornil: ammonium nitrate, alkali nitrate, nitronaphthalene, lead chromate.
The New Gresham Encyclopedia Various

Alsilite: ammonium nitrate, trinitrotoluene, ferrosilicon-aluminium, salt.
The New Gresham Encyclopedia Various

Alumtol: ammonium nitrate, trinitrotoluene, aluminium powder.
The New Gresham Encyclopedia Various

Amide Powder: ammonium nitrate, potassium nitrate, charcoal.
The New Gresham Encyclopedia Various

Sal ammoniac or ammonium nitrate when dissolved in water produce a much more marked cooling effect than does table salt.
Physics Willis Eugene Tower

Astralit (Wetter): ammonium nitrate explosive containing some blasting gelatine.
The New Gresham Encyclopedia Various

Ammonium bichromate is a self-combustible after the type of ammonium nitrate, but scarcely an explosive.
Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 1 Various

Such salts are found in sodium nitrate, or ammonium nitrate, as much as equal weights of either of these substances being added.
The Art and Practice of Silver Printing H. P. Robinson

Monobel: ammonium nitrate, nitroglycerine, wood-meal, alkali chloride.
The New Gresham Encyclopedia Various

noun
a colourless highly soluble crystalline solid used mainly as a fertilizer and in explosives and pyrotechnics. Formula: NH4NO3
ammonium nitrate
A colorless crystalline salt used in fertilizers, explosives, and solid rocket propellants. Chemical formula: NH4NO3.