noun
ammonium
uh-MOH-nee-uhm
noun
1
A positively charged particle (NH4+) formed when ammonia gains an extra hydrogen atom.
"Ammonium compounds are common ingredients in fertilizers."
"The lab measured ammonium levels in the water sample."
How to Use Ammonium
Learner’s notesIn plain EnglishThe chemical ion related to ammonia, found in fertilizers and some cleaning products.
Easily confused with
Word Forms
ammoniums plural
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Etymology
Formed in scientific Latin from "ammonia" plus the chemical suffix "-ium", following the pattern used for naming metallic-acting ions.