phi

Meaning

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

Frequency

20k
Pronounced as (IPA)
/faɪ/
Etymology

From Late Latin phi, from Ancient Greek φεῖ (pheî).

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