Look up pi, PI in Wiktionary, the free dictionary.

Pi, or π, is the mathematical constant equal to a circle's circumference divided by its diameter. Wikipedia does not have an article with this exact name. ... Wiktionary (a portmanteau of wiki and dictionary) is a multilingual, Web-based project to create a free content dictionary, available in over 150 languages. ... When a circles diameter is 1, its circumference is Ï€. Pi or Ï€ is the ratio of a circles circumference to its diameter in Euclidean geometry, approximately 3. ...

Lower-case π

Pi may also refer to: Image File history File links Pi-symbol. ... Image File history File links Pi-symbol. ... When a circles diameter is 1, its circumference is π. Pi or π is the ratio of a circles circumference to its diameter in Euclidean geometry, approximately 3. ...

Letter Pi (π)

• Pi (letter), the Greek letter

  Lowercase π:

  • π (film)
  • π(x), the prime-counting function
  • Pi bond
  • Osmotic pressure
  • A song from the Kate Bush album Aerial
  • Shorthand for pion
  • A men's fragrance from Givenchy
• The symbol for political life used in Boethius' Consolation of Philosophy

  Uppercase Π:

  • The product symbol

For other uses, see Pi (disambiguation) Pi (upper case Π, lower case π or ϖ) is the sixteenth letter of the Greek alphabet. ... π (also known as Pi or Pi - Faith in Chaos) is a 1998 American psychological thriller directed by Darren Aronofsky. ... In mathematics, the prime-counting function is the function counting the number of prime numbers less than or equal to some real number x. ... Electron atomic and molecular orbitals, showing a Pi-bond at the bottom right of the picture. ... This article or section does not adequately cite its references or sources. ... Kate Bushs eighth studio album, Aerial, is a two-disc set released on November 7, 2005. ... In particle physics, pion (short for pi meson) is the collective name for three subatomic particles: π0, π+ and π−. Pions are the lightest mesons and play an important role in explaining low-energy properties of the strong nuclear force. ... Givenchy (pronounced ) is a French brand of clothing, accessories, perfumes and cosmetics. ... This early printed book has many hand-painted illustrations depicting Lady Philosophy and scenes of daily life in fifteenth-century Ghent (1485) Consolation of Philosophy (Latin: Consolatio Philosophiae) is a philosophical work by Boethius written in about the year 524 AD. It has been described as the single most important... In mathematics, multiplication is an elementary arithmetic operation. ...

Pi as a word

• Pi (instrument)
• Pi (.hack), a fictional character from the multimedia franchise .hack//G.U.
• Pi Magazine
• Pi Recordings, a record label
• "Pi", a song from the Hard 'n Phirm album Horses and Grasses
• Pi, a member of Team Robo in Sega Soccer Slam
• Pi, a fictional charater in the novel Life of Pi by Yann Martel

Pi is the generic term for any of a variety of quadruple reed oboes used in the traditional music of Thailand. ... It has been suggested that this article or section be merged with List of . ... October 2004s issue of Pi magazine Pi is a student magazine of the University College London Union. ... Pi Recordings is a jazz record label founded in 2001 by Seth Rosner. ... Horses and Grasses is the first album of the comedy band Hard n Phirm. ... Sega Soccer Slam is a sports game released for the PlayStation 2, Xbox, and GameCube in 2002. ... Life of Pi is a novel by Canadian author Yann Martel. ... Yann Martel (born June 25, 1963 in Salamanca, Spain) is a Canadian author best known for the Man Booker Prize-winning novel Life of Pi. ...

PI as an abbreviation

In science

• Primary immunodeficiency
• An inorganic phosphate group (as P_i)
• The isoelectric point (as pI)
• Phosphatidylinositol
• Propidium iodide
• Predictive Index
• Polyimide
• Potential instability
• Protease inhibitor
• Pistillata, a homeobox gene from Arabidopsis thaliana and which plays a role in The ABC Model of Flower Development

Primary immunodeficiencies are disorders in which part of the bodys immune system is missing or does not function properly. ... Above is a ball-and-stick model of the inorganic hydrogenphosphate anion (HPO42−). Colour coding: P (orange); O (red); H (white). ... The isoelectric point (pI) is the pH at which a molecule or surface carries no net electrical charge. ... Chemical structure of sn-1-stearoyl-2-arachidonoyl phosphatidylinositol Phosphatidylinositol (abbreviated PtdIns, or PI) is a minor phospholipid component of eukaryotic cell membranes. ... Propidium iodide (or PI) is a fluorescent biomolecule that can be used to stain DNA. PI also binds to RNA, necessitating treatment with nucleases to distinguish between RNA and DNA staining (1). ... Predictive Index is a management tool for predicting, describing and measuring the work behavior and potential of individuals and groups at all organizational levels. ... Polyimide (sometimes abbreviated PI) is a polymer of imide monomers. ... This article or section is in need of attention from an expert on the subject. ... Protease inhibitor can refer to: Protease inhibitor (pharmacology): a class of medication that inhibits viral protease Protease inhibitor (biology): a group of proteins that inhibit proteases. ... Binomial name Arabidopsis thaliana (L.) Heynh. ... A diagram of the ABC model. ...

In companies and organizations

• Parents for Inclusion
• Perimeter Institute for Theoretical Physics
• Piedmont Airlines (1948-1989)
• Privacy International
• Pasteur Institute
• Sun Air (Fiji)'s IATA airline designator (as PI)

Parents for Inclusion is a registered charity in the United Kingdom which aims to help parents of children with special educational needs and physical disabilities. ... The Institute facing Waterloo Park The Perimeter Institute for Theoretical Physics is located in the city of Waterloo, Ontario, Canada (also home to the University of Waterloo). ... Piedmont Airlines Logo Piedmont Airlines began flying in 1948. ... Privacy International (PI) has been instrumental in establishing the modern international privacy movement. ... The Pasteur Institute (French: Institut Pasteur) is a French non-profit private foundation dedicated to the study of biology, microorganisms, diseases and vaccines. ... Sun Air is an airline based in Fiji. ...

In professional occupations

• Photographic interpreter, an aerospace and strategic reconnaissance term
• In legal shorthand, it refers to a Plaintiff
• Principal investigator
• Private investigator
• In pharmaceuticals, Parallel Imports

Look up aerospace in Wiktionary, the free dictionary. ... A plaintiff, also known as a claimant or complainer, is the party who initiates a lawsuit (also known as an action) before a court. ... A principal investigator (PI) is the lead scientist for a particular well-defined science project, such as an astronomical observing campaign, laboratory study or clinical trial. ... A private investigator, private detective, PI, or private eye, is a person who undertakes investigations, usually for a private citizen or some other entity not involved with a government or police organization. ...

In computing and Internet

• Page impressions, an online advertising term
• Pebi, a Binary prefix
• Programmed instruction
• Provider Independent Address Space

Online advertising is a form of advertising utilizing the Internet and World Wide Web in order to deliver marketing messages and attract customers. ... // In computing, binary prefixes can be used to quantify large numbers where powers of two are more useful than powers of ten (such as computer memory sizes). ... Programmed instruction is a field first studied extensively by the behaviorist B.F. Skinner. ... Provider Independent Address Space (PI-addresses) are Internet Protocol addresses assigned by the Registries directly to an end-user organization, without going through an Internet Service Provider. ...

Other abbreviations

• Pass interference in American football
• Parameter indicator, in ISO standards
• People's Initiative
• The Philippines (from "Philippine Islands")
• Public intoxication
• Seattle Post-Intelligencer
• Philippine Idol
• Primitive Instinct
• Plasticity Index

In American Football pass interference is when a player interferes with an eligible receivers ability to make a fair attempt to catch a forward pass. ... “ISO” redirects here. ... People’s Initiative or PI is one of the modes in which the 1987 Constitution of the Philippines could be amended. ... Public intoxication, also known as drunk and disorderly conduct, is a summary offence in many countries. ... The daily Seattle Post-Intelligencer is the second leading newspaper in Seattle, Washington, United States. ... Philippine Idol host Ryan Agoncillo with judges Ryan Cayabyab, Pilita Corrales and Francis Magalona. ... Primitive Instinct are a Progressive/Classic Rock band, formed in 1987 in Maidstone, Kent, England, by Guitarist/Vocalist/Songwriter Nick Sheridan, who still fronts the band today. ... The Plasticity Index (often abbreviated as PI) is a numerical measure of the plasticity of a soil. ...

See also

• P
• Pi the movie
• Pie (disambiguation)
• pi function

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