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AMMONIUM

 - 5 dictionary results
Ammonia/Ammonium Assay
Rapid colorimetric/fluorometric assay for ammonia and ammonium.
www.bioassaysys.com

am⋅mo⋅ni⋅um

  [uh-moh-nee-uhm]
–noun Chemistry.
the univalent ion, NH4 +, or group, NH4, which plays the part of a metal in the salt formed when ammonia reacts with an acid.
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Origin:
< NL; see ammonia, -ium; coined by J. J. Berzelius in 1808
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2010.
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Ammonia/Ammonium Assay
Rapid colorimetric/fluorometric assay for ammonia and ammonium.
www.bioassaysys.com
am·mo·ni·um   (ə-mō'nē-əm)   
n.  The univalent chemical ion NH4+, derived from ammonia, whose compounds chemically resemble the alkali metals.

[ammon(ia) + -ium.]
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: am·mo·ni·um
Pronunciation: &-'mO-nE-&m
Function: noun
: an ion NH4+derived from ammonia bycombination with a hydrogen ion and known in organic compounds (as quaternary ammonium compounds) and in compounds (as salts) that resemble in properties the compounds of the alkali metals
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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ammonium am·mo·ni·um (ə-mō'nē-əm)
n.
The univalent radical NH4+, that is derived from ammonia and that reacts as a univalent metal in forming ammonium compounds.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Science Dictionary
ammonium   (ə-mō'nē-əm)  Pronunciation Key 
A positively charged ion, NH4, derived from ammonia and found in a wide variety of organic and inorganic compounds. Compounds of ammonium chemically resemble the alkali metals.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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