(inorganic chemistry) The silver salt of nitric acid, AgNO₃; it is sensitive to light and is used in the preparation of silver halides for photography; it is used in laboratories as a reagent to test for chloride

(inorganic chemistry) The ammonium salt of nitric acid, NH₄NO₃; it is used in fertilizers and explosives (notoriously in improvised explosive devices, though its main importance is as an explosive in its own right and in mixtures such as amatol and ANFO).

An urban air pollutant formed photochemically in the air as part of photochemical smog.

(Canada, derogatory) A Native North American. / (Canada, used among ethnic Ojibwe and Cree) (my) friend

(pharmacology) A synthetic nitrothiazolyl-salicylamide derivative used as an antiprotozoal agent.

amoscanate

(inorganic chemistry) A colourless salt that absorbs moisture from the air and mainly used as a component in fertilizer.

An insecticide used to kill external parasites of livestock and pets.

(Scotland, Northern England) Very cold; shrivelled with cold.

(obsolete) Potassium nitrate.