ammonium

A1M3M3O1N1I1U1M3
US/əˈmoʊni.əm/

noun

The univalent NH₄⁺ cation, derived by the protonation of ammonia

Similar
ammonium ion
OriginNew Latin ammōnium →
Less commonScrabble 14
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Meanings

nounammonium (usually uncountable, plural ammoniums)

plural ammoniums

  1. uncountableusuallychemistryThe univalent NH₄⁺ cation, derived by the protonation of ammonia
  2. especiallyin compoundsuncountableusuallychemistryAny similar cation formed by replacing one or more hydrogen atoms with alkyl or aryl radicals

Synonyms & antonyms

nounthe ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion

Similar
ammonium ion
Broader
ammonia
Also see
mersa matruh

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. New Latinammōnium
  2. Englishammonium

From New Latin ammōnium. Equivalent to ammonia + -ium.

More words from New Latin

Full word history & related roots →

Translations

Brazilian Portuguese amônio
  • amôniounivalent NH4+ cation
Catalan amoni
  • amoniunivalent NH4+ cation
Chinese Cantonese 銨 /铵
  • 銨 /铵 (on¹)univalent NH4+ cation
Chinese Mandarin 銨 /铵
  • 銨 /铵 (ǎn)univalent NH4+ cation
Czech amonium
  • amoniumunivalent NH4+ cation
Danish ammonium
  • ammoniumunivalent NH4+ cation
Dutch ammonium
  • ammoniumunivalent NH4+ cation
European Portuguese amónio
  • amóniounivalent NH4+ cation
Finnish ammoniumioni
  • ammoniumioniunivalent NH4+ cation
French ammonium
  • ammoniumunivalent NH4+ cation
German Ammonium
  • Ammoniumunivalent NH4+ cation
Greek αμμώνιο
  • αμμώνιο (ammónio)univalent NH4+ cation
Hebrew אמוניום
  • אמוניום (amónium)univalent NH4+ cation
Hindi तिक्तातु, अमोनियम
  • तिक्तातु (tiktātu)univalent NH4+ cation
  • अमोनियम (amoniyam)univalent NH4+ cation
Hungarian ammónium
  • ammóniumunivalent NH4+ cation
Indonesian amonium
  • amoniumunivalent NH4+ cation
Irish amóiniam
  • amóiniamunivalent NH4+ cation
Italian ammonio
  • ammoniounivalent NH4+ cation
Japanese アンモニウム
  • アンモニウム (anmoniumu)univalent NH4+ cation
Korean 암모늄
  • 암모늄 (ammonyum)univalent NH4+ cation
Polish amon
  • amonunivalent NH4+ cation
Romanian amoniu
  • amoniuunivalent NH4+ cation
Russian аммо́ний
  • аммо́ний (ammónij)univalent NH4+ cation
Spanish amonio
  • amoniounivalent NH4+ cation
Vietnamese amoni
  • amoniunivalent NH4+ cation
Cite this entry
APA

ammonium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/ammonium

MLA

“ammonium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/ammonium. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “ammonium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/ammonium.

Source: ammonium on Wiktionary, CC BY-SA 4.0.