phi meaning
Phi (/faÉª/; uppercase Ï, lowercase Ï or Ï; Ancient Greek: ÏÎµá¿ pheÃ®; Modern Greek: ÏÎ¹ fi ) is the 21st letter of the Greek alphabet. In Ancient Greek, it represented an aspirated voiceless bilabial plosive (), which was the origin of its usual romanization as ph.