(chemistry) An inorganic polymer, of empirical formula Si₃N₄, used in ceramics and some transistors.

(inorganic chemistry) A binary compound of boron and nitrogen, of empirical formula BN; exists in forms analogous to the allotropes of carbon, many of which are inorganic polymers.

(chiefly Britain) Alternative spelling of sulfur nitride

(chemistry) a simple binary compound of sulfur and nitrogen, S₄N₄, having a ring structure; it is explosive / (chemistry) an inorganic polymer, [SN]ₙ, that has metallic properties

(chemistry) The potassium salt of nitrous acid, KNO₂.

(chemistry) The sodium salt of nitrous acid, NaNO₂; used as a food preservative and in many industrial applications.

(inorganic chemistry) the sodium salt of nitric acid, NaNO₃; used as a food preservative, and as an oxidizing agent in explosives such as sodatol.

(inorganic chemistry) KNO₃, a naturally occurring salt, notably used as an ingredient of gunpowder; also used a food preservative and as an ingredient in toothpaste for sensitive gums; historically used in the production of nitric acid (HNO₃).

(chemistry) nitric acid

(physics, astronomy) A group of nuclear reactions, that involve the interaction of protons with carbon, nitrogen and oxygen nuclei, thought to be the main source of energy in main-sequence stars of greater than 1.4 solar mass.