phi

[fahy]

noun

plural

phis 

1. the 21st letter of the Greek alphabet (Φ, φ).

2. the consonant sound represented by this letter.

phi

/ faɪ /

noun

1. the 21st letter in the Greek alphabet (Φ, φ), a consonant, transliterated as ph or f

Example Sentences

If phi mesons can add to the strong force field, their cousins should, too—and J/psi mesons’ spin polarizations should be similarly impacted by the resulting fluctuations.

Read more on Scientific American

If you divide 'a' by 'b' and 'a'-plus-'b' by 'a,' you get phi, which is roughly 1.618.

Read more on Salon

Literally full of sigmas, phis, omegas and other symbols.

Read more on Washington Times

Having seen the alpha and omega of the series, I'm eager to see the gamma, delta, epsilon and phi, or whichever intermediate Greek letters you want to represent those four other episodes.

Read more on Los Angeles Times

In modern Greek, phi sounds like “f,” but it is usually transliterated from ancient Greek as “ph.”

Read more on The New Yorker