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We found 32 dictionaries with English definitions that include the word phi:
Click on the first link on a line below to go directly to a page where "phi" is defined.

General (20 matching dictionaries)

1. phi: Merriam-Webster.com [home, info]
2. Phi, phi: Oxford Learner's Dictionaries [home, info]
3. phi: American Heritage Dictionary of the English Language [home, info]
4. phi: Collins English Dictionary [home, info]
5. phi: Vocabulary.com [home, info]
6. Phi, phi, phi: Wordnik [home, info]
7. phi: Wiktionary [home, info]
8. phi: Webster's New World College Dictionary, 4th Ed. [home, info]
9. PHI: Dictionary.com [home, info]
10. phi: UltraLingua English Dictionary [home, info]
11. PHI (disambiguation), PHI, Phi (KinKi Kids album), Phi (disambiguation), Phi (letter), Phi: Wikipedia, the Free Encyclopedia [home, info]
12. phi: Rhymezone [home, info]
13. PHI: Stammtisch Beau Fleuve Acronyms [home, info]
14. phi: Free Dictionary [home, info]
15. phi: Mnemonic Dictionary [home, info]
16. phi: WordNet 1.7 Vocabulary Helper [home, info]
17. phi: LookWAYup Translating Dictionary/Thesaurus [home, info]
18. phi: Dictionary/thesaurus [home, info]
19. phi: The Wordsmyth English Dictionary-Thesaurus [home, info]
20. phi: Infoplease Dictionary [home, info]

Art (1 matching dictionary)

21. Phi: Glossary of Stamp Collecting Terms [home, info]

Computing (1 matching dictionary)

22. Phi (Golden Ratio), Phi (number): Encyclopedia [home, info]

Medicine (2 matching dictionaries)

23. phi: online medical dictionary [home, info]
24. PHI (disambiguation), phi: Medical dictionary [home, info]

Miscellaneous (4 matching dictionaries)

25. phi: Encyclopedia of Graphic Symbols [home, info]
26. PHI: Acronym Finder [home, info]
27. PHI: Three Letter Words with definitions [home, info]
28. PHI: AbbreviationZ [home, info]

Religion (1 matching dictionary)

29. PHI: Irivng Hexham's Concise Dictionary of Religion [home, info]

Science (1 matching dictionary)

30. PHI: Cytokines & Cells Online Pathfinder Encyclopaedia [home, info]

Slang (1 matching dictionary)

31. Phi: Urban Dictionary [home, info]

Tech (1 matching dictionary)

32. phi: Rane Professional Audio Reference [home, info]

(Note: See phis for more definitions.)

Quick definitions from WordNet (phi) ▸ noun:  the 21st letter of the Greek alphabet ▸ name:  A surname (very rare: popularity rank in the U.S.: #79857) ▸ Also see phis ▸ Words similar to phi ▸ Usage examples for phi ▸ Idioms related to phi (New!) ▸ Popular adjectives describing phi ▸ Words that often appear near phi ▸ Rhymes of phi ▸ Invented words related to phi