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Niter

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ni⋅ter

[nahy-ter]
Also, especially British, nitre.


Origin:
1375–1425; late ME nitre < L nitrum < Gk nítron natron
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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ni·ter   (nī'tər)   
n.  A white, gray, or colorless mineral of potassium nitrate, KNO3, used in making gunpowder. Also called saltpeter.

[Middle English nitre, sodium carbonate, natron, from Old French, from Latin nitrum, from Greek nitron, from Egyptian nṯr.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: ni·ter
Variant: or chiefly British ni·tre /'nIt-&r/
Function: noun
1 : POTASSIUM NITRATE
2 archaic : CHILE SALTPETER
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Science Dictionary
niter   (nī'tər)  Pronunciation Key 
A naturally occurring mineral form of potassium nitrate. It is used to make gunpowder.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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