| 释义 |
- Science and technology Mathematics Physics, chemistry and biology Computing Medicine Other science
- Arts and entertainment
- Organizations
- Other uses
- See also
{{wiktionary|Phi|phi}}Phi (uppercase Φ, lowercase φ, or maths symbol ϕ) is the 21st letter of the Greek alphabet. Phi or PHI may also refer to: {{TOC right}}Science and technologyMathematics- Golden ratio (φ)
- Phi coefficient, a measure of association for two binary variables introduced by Karl Pearson
- Euler's totient function or phi function
Physics, chemistry and biology- Phi meson, in particle physics
- Magnetic flux (Φ)
- Peptide PHI (Peptide histidine isoleucine)
- 6-phospho-3-hexuloisomerase, an enzyme
- Phenyl group (Φ), a functional group in organic chemistry
- Pre-harvest interval
Computing- Xeon Phi, an Intel MIC microprocessor
- Φ (Phi) function, in static single assignment form compiler design
Medicine- Permanent health insurance, against becoming disabled
- Protected health information, in US law
Other science- Phi phenomenon, in visual perception
- Krumbein phi scale, for the size of a particle or sediment
Arts and entertainment- Phi (KinKi Kids album) (2007)
- Phi (Truckfighters album) (2007)
- Sailor Phi, a villain in the Sailor Moon manga
- Phi, a character in the visual novels Virtue's Last Reward and Zero Time Dilemma.
- Phi: A Voyage from the Brain to the Soul, a book by Giulio Tononi (2012)
Organizations- Packard Humanities Institute
- Paraprofessional Healthcare Institute, a nonprofit organization based in New York City, US
- Pepco Holdings Inc.
- Petroleum Helicopters International, an American commercial helicopter operator
- Post-Polio Health International
- Phi, a collegiate secret society at Princeton University
Other uses- Voiceless bilabial fricative (IPA symbol: {{IPA|ɸ}})
- Phi, a village in Sesant, Cambodia
- Phi, ghosts in Thai culture
See also- Փ, a letter of the Armenian alphabet
- PHI-base (Pathogen-Host Interaction database)
- Kamen Rider 555 or Masked Rider Φ's
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