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Kotomora

硝しょう石せき

しょ
う
せ
き

Meanings

1

noun

saltpeter; potassium nitrate; niter

Chemical term for potassium nitrate (KNO₃), historically used in gunpowder, fertilizers, and food preservation. The cross-reference to 硝酸カリウム indicates it is the same substance.

See also: 硝酸カリウム