Saltpeter meaning

sôltpētər
(US) Alternative spelling of saltpetre.
noun
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Origin of saltpeter

  • Middle English salpetre from Old French from Medieval Latin sālpetrae Latin sāl salt sal- in Indo-European roots Latin petrae genitive of petra rock (from Greek petrā per-2 in Indo-European roots)

    From American Heritage Dictionary of the English Language, 5th Edition