[ nīt] ′ər niter definition by Webster's New World
noun potassium nitrate sodium nitrate Origin: Middle English nitre ; from Middle French ; from Classical Latin nitrum ; from Classical Greek nitron, native soda, natron ; from Classical Hebrew (language) or Egypt: Classical Hebrew (language) netr ; from Egyptian nṯr Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
niter definition by American Heritage Dictionary
A white, gray, or colorless mineral of potassium nitrate, KNO
3, used in making gunpowder. Also called saltpeter. Origin: Middle English nitre, sodium carbonate, natron, from Old French, from Latin nitrum, from Greek nitron, from Egyptian nīr. The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. niter - Science Definition
A naturally occurring mineral form of potassium nitrate. It is used to make gunpowder.