Phi (disambiguation)

Look up Phi or phi in Wiktionary, the free dictionary.

Phi (uppercase Φ, lowercase φ, or math symbol ϕ) is the 21st letter of the Greek alphabet.

Phi or PHI may also refer to:

Mathematics

• Golden ratio or φ
• Phi coefficient, a measure of association for two binary variables introduced by Karl Pearson
• Euler's totient function or phi function
• Φ (Phi) function, a function in static single assignment form

Medicine and health

• Paraprofessional Healthcare Institute, a nonprofit organization based in New York City
• Permanent health insurance, income replacement for employees who are unable to work due to disability
• Post-Polio Health International
• Protected health information

Science

• Phi meson
• Phi phenomenon in visual perception
• Krumbein phi scale for the size of a particle or sediment
• Magnetic flux or Φ
• Peptide PHI or Peptide histidine isoleucine
• 6-phospho-3-hexuloisomerase or PHI, an enzyme
• PHI-base or Pathogen-Host Interaction database

Sport

• Philadelphia 76ers, a National Basketball Association team
• Philadelphia Eagles, a National Football League team
• Philadelphia Flyers, a National Hockey League team
• Philadelphia Phillies, a Major League Baseball team

Other uses

• Phi (KinKi Kids album) (2007)
• Phi (Truckfighters album) (2007)
• Packard Humanities Institute
• Pepco Holdings Inc.
• Kamen Rider 555 or Masked Rider Φ's
• Sailor Phi, a villain in the Sailor Moon manga
• ɸ, the IPA symbol for voiceless bilabial fricative
• Phi, a village in Sesant, Cambodia
• Phi, a secret society at Princeton University
• Phi, a character in the visual novel Zero Escape: Virtue's Last Reward
• Phi, ghosts in Thai culture
• Xeon Phi, an Intel MIC microprocessor

See also

• Փ, a letter of the Armenian alphabet