masculine noun
1. (potassium nitrate) 
a. saltpeter (United States) 
El mineral más común de la región es el salitre.Saltpeter is the most common mineral in the region.
b. saltpetre (United Kingdom) 
Las paredes de la cueva estaban cubiertas de salitre.The cavern walls were covered in salpetre.
c. nitre (United States) 
El ejército adquirió salitre para fabricar pólvora y explosivos.The army bought nitre to make gunpowder and explosives.
d. niter (United Kingdom) 
Este fertilizante contiene salitre.This fertilizer contains niter.
2. (saline substance) 
Las piedras debajo del muelle estaban cubiertas de salitre.The rocks below the pier were covered in salt residue.
1. (general) 
a. saltpeter 
1 (sustancia salina) saltpetre; saltpeter; (EEUU) nitre
2 (Chile) (nitrato de Chile) Chilean nitrate
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