Definition

Noun 1. Potassium nitrate (KNO₃): A white crystalline salt, used especially as a fertilizer, in food preservation, and in the manufacture of explosives and fireworks. It is also known as saltpeter.

Usage Examples

• The historical recipe for gunpowder required charcoal, sulfur, and niter.
• Farmers in some regions historically used niter as a source of nitrogen for crops.
• The formation of niter can sometimes be seen as a white crust on old stone walls or in caves.

Advanced Usage

• "Chile saltpeter" vs. "niter": While "niter" typically refers to potassium nitrate (KNO₃), the term "Chile saltpeter" or "soda niter" refers to sodium nitrate (NaNO₃), a different compound also used as a fertilizer. The context usually clarifies which mineral is meant.
• Historical/Geological Context: The word is often used in historical texts discussing early chemistry, agriculture, or warfare, or in geological descriptions of mineral deposits.

Variants and Related Words

• Saltpeter (noun): The most common synonym for niter (potassium nitrate).
• Nitrate (noun): A broader chemical term for any salt or ester of nitric acid, which includes niter.
• Nitre: The British English spelling variant of "niter."

Synonyms

• Saltpeter
• Potassium nitrate
• Nitrate of potash

Related Phrases and Compounds

• Niter bed: A historical term for a constructed pile of organic material and earth from which niter was leached.
• Niter cave: A natural cave where niter deposits form.

Noun

1. (KNO3) used especially as a fertilizer and explosive