ammonium

play
noun am·mo·ni·um \ə-ˈmō-nē-əm\

Definition of ammonium

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

Origin and Etymology of ammonium

New Latin, from ammonia


First Known Use: 1808


Ammonium

geographical name am·mo·ni·um

Definition of Ammonium

  1. — see siwa


Medical Dictionary

ammonium

play
noun am·mo·ni·um \ə-ˈmō-nē-əm\

Medical Definition of ammonium

  1. :  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


Learn More about ammonium


Seen and Heard

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 strike by flicking the finger outward

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

  • hot-dog--hot-dog--hot-dog--hot-dog-cat
  • Which of the following words is not a synonym for ‘a young person’?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

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

TAKE THE QUIZ