potassium nitrate

Từ điển WordNet v3.1 - WordNet Dictionary

noun

(KNO3) used especially as a fertilizer and explosive
• Syn:
saltpeter, saltpetre, niter, nitre
• Derivationally related forms:
nitric (for: nitre), nitrous (for: nitre)
• Hypernyms:
nitrate
• Substance Holonyms:
fertilizer, fertiliser, plant food