A transparent white crystalline compound, KNO3, used to pickle meat and in the manufacture of pyrotechnics, explosives, matches, rocket propellants, and fertilizers. Also called saltpeter硝酸钾,钾硝:透明的白色晶体状化合物,KNO3,用来腌制肉类,并用于制造烟火、炸药、火柴、火箭推进燃料及化肥 也作 saltpeter