Definition

Noun: 1. Potassium nitrate (KNO₃): A white crystalline chemical compound, used historically and in modern applications as a fertilizer, in food preservation, and as a key component in gunpowder and other explosives. - The miners used dynamite containing nitre to blast through the rock. - Saltpeter, another name for nitre, was a valuable commodity in ancient times.

Usage Examples

• As a chemical substance:

  • The soil was enriched with nitre to improve crop yields.
  • Early fireworks recipes often listed nitre as a primary ingredient.

• In historical/industrial contexts:

  • The cave walls were coated with nitre deposits.
  • The manufacture of gunpowder requires sulfur, charcoal, and nitre.

Advanced Usage

• "Chile nitre" or "soda nitre": These are historical or alternative names for sodium nitrate (NaNO₃), a related but distinct compound. The term "nitre" alone typically refers to potassium nitrate.
  • Chile nitre was a major export product in the 19th century.

Variants and Related Words

• Saltpeter / Saltpetre (n): The most common synonym for potassium nitrate.

  • Saltpeter was mined from deposits in caves and stables.

• Niter (n): An alternative spelling, primarily used in American English.

  • The chemical formula for niter is KNO₃.

• Nitrate (n): A broader class of chemical compounds containing the nitrate ion (NO₃⁻). Nitre is a specific type of nitrate.

  • Nitrates are common in both fertilizers and preserved meats.

Synonyms

• Potassium nitrate: The systematic chemical name.
• Saltpeter / Saltpetre: The traditional name.

Related Phrases and Compounds

• Nitre cake: An industrial term for crude sodium bisulfate, a byproduct of nitric acid production. This is a distinct compound and usage from "nitre" itself.
• Nitre bed: A historical method for producing saltpeter artificially by composting organic matter with manure and earth.

Noun

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