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- saltpeter (US)
From Middle English saltpetre, alteration of Old French salpetre, from Medieval Latin sāl petrae (“salt of the rock”), named so, since found as an incrustation. Association with salt led to the alteration of spelling in the first element.
- (potassium nitrate): Chilean saltpeter/Chilean saltpetre, nitrate of potash, niter/nitre, potassium nitrate
- (sodium nitrate): caliche, Chile saltpeter/Chile saltpetre, soda niter/soda nitre, sodium nitrate
potassium nitrate — see potassium nitrate
sodium nitrate — see sodium nitrate