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.

From Scientific American

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

From Salon

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

From 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.

From Los Angeles Times

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

From The New Yorker