Word.ws English Dictionary

Plural of phi

regular plural

The plural of phi is phis.

Forms of phi

Singularphi /faɪ/
Pluralphis
Countablecountable

Meaning of phi

  1. noun Φ, the 21st letter of the Euclidean and modern Greek alphabet, usually romanized as "ph".
  2. noun The golden ratio.
  3. noun A visual illusion whereby a sequential pattern of lights produces a false sense of motion.

Full definition of phi

Questions about the plural of phi

What is the plural of phi?
The plural of phi is phis.
Is phi countable?
Phi is a countable noun.

Source and license

Adapted from Wiktionary: phi (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

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Cite this page: “Plural of phi.” Word.ws, https://word.ws/plural/phi. Based on Wiktionary, CC BY-SA 4.0.