Etymology

phi

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Today it means: Φ, the 21st letter of the Euclidean and modern Greek alphabet, usually romanized as "ph". Full definition →

Late Latin phi ← Ancient Greek φεῖ
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The story

  1. Ancient Greek · derived fromφεῖ
  2. Late Latin · derived fromphi
  3. English todayphi

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

Etymology from Wiktionary, CC BY-SA 4.0.