Dictionary.com
definitions
  • synonyms

ammonium

[uh-moh-nee-uh m]
noun Chemistry.
  1. the univalent ion, NH4+, or group, NH4, which plays the part of a metal in the salt formed when ammonia reacts with an acid.
Show More

Origin of ammonium

< New Latin; see ammonia, -ium; coined by J. J. Berzelius in 1808
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for ammonium

Contemporary Examples

Historical Examples


British Dictionary definitions for ammonium

ammonium

noun
  1. (modifier) of, consisting of, or containing the monovalent group NH 4 – or the ion NH 4 +ammonium compounds
Show More
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ammonium in Medicine

ammonium

(ə-mōnē-əm)
n.
  1. The univalent radical NH4+, that is derived from ammonia and that reacts as a univalent metal in forming ammonium compounds.
Show More
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

ammonium in Science

ammonium

[ə-mōnē-əm]
  1. 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.
Show More
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.