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We found 16 dictionaries with English definitions that include the word phosphonium:
Click on the first link on a line below to go directly to a page where "phosphonium" is defined.

General (15 matching dictionaries)

1. phosphonium: Merriam-Webster.com [home, info]
2. phosphonium: Oxford Learner's Dictionaries [home, info]
3. phosphonium: American Heritage Dictionary of the English Language [home, info]
4. phosphonium: Collins English Dictionary [home, info]
5. phosphonium: Wordnik [home, info]
6. phosphonium: Wiktionary [home, info]
7. phosphonium: Webster's New World College Dictionary, 4th Ed. [home, info]
8. phosphonium: Infoplease Dictionary [home, info]
9. phosphonium: Dictionary.com [home, info]
10. Phosphonium: Wikipedia, the Free Encyclopedia [home, info]
11. Phosphonium: Online Plain Text English Dictionary [home, info]
12. phosphonium: Webster's Revised Unabridged, 1913 Edition [home, info]
13. Phosphonium: AllWords.com Multi-Lingual Dictionary [home, info]
14. phosphonium: Free Dictionary [home, info]
15. phosphonium: Dictionary/thesaurus [home, info]

Medicine (1 matching dictionary)

16. phosphonium: online medical dictionary [home, info]

Quick definitions from Wiktionary (phosphonium) ▸ noun:  (chemistry) the tetravalent positively-charged phosphorus cation R₄P⁺ ▸ Words similar to phosphonium ▸ Usage examples for phosphonium ▸ Idioms related to phosphonium (New!) ▸ Popular adjectives describing phosphonium ▸ Words that often appear near phosphonium ▸ Rhymes of phosphonium ▸ Invented words related to phosphonium