出典:Wiktionary
出典:『Wiktionary』 (2025/01/09 22:59 UTC 版)
From 中期英語 niter, nitere, nitre, nytre, from Old French nitre, from Latin nitrum (“native soda, natron”), from Ancient Greek νίτρον (nítron). Ultimately from Egyptian nṯrj (“natron”). Doublet of natron and trona. Compare also natrium, nitrogen.
niter (countable and uncountable, plural niters)
出典:Wikipedia
出典:『Wikipedia』 (2011/07/15 02:36 UTC 版)
Niter (AmE) or nitre (BrE) is the mineral form of potassium nitrate, KNO3, also known as saltpeter (AmE) or saltpetre (BrE). Historically, the term "nitre" – cognate with "natrium", a Latin word for sodium – has been very vaguely defined, and it has been applied to a variety of other minerals and chemical compounds, including sodium nitrate (also "soda nitre," "cubic nitre", or nitratite), sodium carbonate and potassium carbonate.