noun Etymology: Middle English salt petre, alteration of salpetre, from Medieval Latin sal petrae, literally, salt of the rock Date: 14th century potassium nitrate , sodium nitrate
SALTPETER
Meaning of SALTPETER in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012