from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Potassium nitrate.
- n. Sodium nitrate.
from The Century Dictionary and Cyclopedia
- n. See saltpeter.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. (KNO3) used especially as a fertilizer and explosive
From the Old French salpetre, from Late Latin sāl petrae ("stone salt; possibly "salt of Petra""). (Wiktionary)