phi

views updated

phi / / • n. the twenty-first letter of the Greek alphabet (Φ, φ), transliterated as ‘ph.’ ∎  (Phi) [followed by Latin genitive] Astron. the twenty-first star in a constellation: Phi Eridani.• symb. ∎  (φ) a plane angle. ∎  (φ) a polar coordinate. Often coupled with θ.

More From encyclopedia.com