saltpetre

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English[edit]

Alternative forms[edit]

Etymology[edit]

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.

Noun[edit]

saltpetre (usually uncountable, plural saltpetres)

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  1. (originally) Potassium nitrate.
  2. (uncommon) Sodium nitrate.

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