Dictionary.com

ammonium

[ uh-moh-nee-uhm ]
/ əˈmoʊ ni əm /
Save This Word!

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.

COMPARE MEANINGS

Click for a side-by-side comparison of meanings. Use the word comparison feature to learn the differences between similar and commonly confused words.
QUIZ
TAKE JOY IN ACING THIS QUIZ ON “PRIDE” SYNONYMS
Hold your head up high as you embark on this quiz that explores some of the synonyms and meanings of “pride.”
Question 1 of 7
What does "dignity" mean?

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. 2022

How to use ammonium in a sentence

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

Medical 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.

Scientific 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.
FEEDBACK