ammonium

[ uh-moh-nee-uh m ]
/ əˈmoʊ ni əm /

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.

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. 2019

Examples from the Web for ammonium

British Dictionary definitions for ammonium

ammonium

/ (əˈməʊnɪəm, -njəm) /

noun

(modifier) of, consisting of, or containing the monovalent group NH 4 – or the ion NH 4 +ammonium compounds
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

Medicine definitions for ammonium

ammonium

[ ə-mōnē-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.

Science definitions for ammonium

ammonium

[ ə-mōnē-əm ]

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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.