phosphonium

P3H4O1S1P3H4O1N1I1U1M3

noun

the tetravalent positively-charged phosphorus cation R₄P⁺

OriginEnglish onium ← New Latin ammōnium ← Latin phōsphorus →
Scrabble 23
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Meanings

nounphosphonium (plural phosphoniums)

plural phosphoniums

  1. chemistrythe tetravalent positively-charged phosphorus cation R₄P⁺

Origin

  1. Proto-Indo-European*bʰeh₂-
  2. Proto-Indo-European*bʰéh₂os
  3. Proto-Hellenic*pʰáwos
  4. Ancient Greekφᾰ́ος (phắos)
  5. Ancient Greekφῶς (phôs)
  6. Proto-Indo-European*bʰer-
  7. Proto-Indo-European*bʰéreti
  8. Proto-Hellenic*pʰérō
  9. Ancient Greekφέρω (phérō)
  10. Ancient Greekφωσφόρος (phōsphóros)
  11. Latinphōsphorus
  12. Englishphosphorusclip.
  13. Englishphosph-
  14. New Latinammōnium
  15. Englishammonium
  16. Englishonium
  17. Englishphosphonium

From phosph- + -onium.

Full word history & related roots →

Rhymes & wordplay

Rhymes with phosphonium

plutoniumpandemoniumeuphoniumharmoniummeconiumpoloniumpelargoniumpandamoniumIconiumpancuroniumvecuroniumstramoniumfandemoniumhydroniumbalonium-curoniumdecamethoniumdiazoniumfluoroniummeldoniumoniumoxoniumpurdoniumrocuronium
All rhymes →
Cite this entry
APA

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

MLA

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

Chicago

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

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