ammonium

noun
am·mo·ni·um | \ə-ˈmō-nē-əm \

Definition of ammonium 

: an ion NH4+ derived from ammonia by combination with a hydrogen ion and known in compounds (such as salts) that resemble in properties the compounds of the alkali metals

Examples of ammonium in a Sentence

Recent Examples on the Web

The middle of the cylinder is filled with a powdered mixture of ammonium perchlorate and ammonium nitrate, the oxidants. The Economist, "A rocket that devours itself," 31 May 2018 Scientists found higher than normal levels of ammonium and nitrogen, ingredients of the fertilizer. Carrie Blackmore Smith, Cincinnati.com, "'Human error' caused barge to crack in half and spill fertilizer into the Ohio River," 4 Apr. 2018 In another building at Promontory, the segments are lowered into an underground shaft where they will be loaded with solid rocket fuel, a mixture of aluminum powder fuel and ammonium perchlorate as the oxidizer. Joe Pappalardo, Popular Mechanics, "Solid Rocket City: The Utah Space Center Fighting for Its Life," 4 Apr. 2018 The drink does contain ammonium ferric citrate, which is technically iron, but it is not brewed. Palko Karasz, New York Times, "Irn Bru, a Scottish Favorite, Loses Some Sugar," 5 Jan. 2018 Takata uses the chemical ammonium nitrate to inflate air bags. Tom Krisher, Detroit Free Press, "Ford says it will fight latest Takata airbag recall," 21 July 2017 Takata uses ammonium nitrate to create a small explosion that inflates air bags in a crash. Tom Krishner, USA TODAY, "Recalled Takata air bags showing up in used cars, lawsuit alleges," 22 Aug. 2017 And the ammonium version is milder than the sodium version. Deena Campbell, SELF, "When You Need to Use a Sulfate-Free Shampoo—and When You Totally Don't," 10 Aug. 2017 Takata uses the chemical ammonium nitrate to inflate air bags. Tom Krisher, Detroit Free Press, "Ford says it will fight latest Takata airbag recall," 21 July 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ammonium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of ammonium

1808, in the meaning defined above

History and Etymology for ammonium

New Latin, from ammonia

Keep scrolling for more

Learn More about ammonium

Statistics for ammonium

Look-up Popularity

Time Traveler for ammonium

The first known use of ammonium was in 1808

See more words from the same year

Keep scrolling for more

More Definitions for ammonium

ammonium

noun
am·mo·ni·um | \ə-ˈmō-nē-əm \

Medical Definition of ammonium 

: an ion NH4+ derived from ammonia by combination 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

More from Merriam-Webster on ammonium

Britannica English: Translation of ammonium for Arabic Speakers

Comments on ammonium

What made you want to look up ammonium? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to reject or criticize sharply

Get Word of the Day daily email!

Test Your Vocabulary

Words from Greek and Roman Mythology Quiz

  • the-triumph-of-venus-by-alessandro-magnasco
  • Boreal comes from the name of the ancient Greek god of which wind?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!