All articles starting with P
28,818 articles
Purchasing power parity
Purchasing power parity (PPP) is the theory that exchange rates adjust so a given amount of any currency buys the same bundle of goods and services in every country.
Purdah
Purdah (parda, Urdu/Persian for curtain) is the South Asian practice of female seclusion and veiling among Muslim and Hindu communities, marked by the burqa, the purdahnashin, and the British pre-election purdah usage.
Purdah (pre-election period)
Purdah, now the pre-election period of sensitivity, is the UK convention before elections and referendums restricting government announcements and use of public resources; referendum rules of 28 days come from PPERA 2000.
Purdue Boilermakers football
Purdue Boilermakers football is Purdue University's Big Ten program, founded 1887, nicknamed Boilermakers since 1891, with 12 conference titles, the 1967 Rose Bowl win, and coach Barry Odom since 2024.
Purdue Boilermakers men's basketball
Purdue Boilermakers men's basketball, also known as Purdue University men's basketball, is Purdue's Big Ten program, with 26 conference titles, Final Fours in 1969, 1980, and 2024, and coach Matt Painter.
Purdue Pegboard Test
The Purdue Pegboard Test is a timed psychometric test measuring finger and hand dexterity, developed at Purdue University in 1948 and now used in occupational therapy and neuropsychology.
Purdue Pharma
Purdue Pharma L.P., Sackler-family-owned maker of OxyContin (extended-release oxycodone, FDA-approved 1995). Pleaded guilty in 2007 and 2020 over deceptive opioid marketing; bankruptcy, 2024 Supreme Court ruling, $7.4B settlement, dissolved into Knoa Pharma.
Purdue University
Purdue University: Indiana public land-grant research university founded 1869 in West Lafayette, named for benefactor John Purdue. Known for 14 years of frozen tuition, top-5 graduate engineering, the SCALE microelectronics program, and 100,000+ students.
Pure 4D N = 1 supergravity
Pure 4D N = 1 supergravity is the locally supersymmetric extension of general relativity in four dimensions, containing a graviton and one spin-3/2 gravitino and no matter multiplets.
Pure and mixed quantum states
A pure quantum state is described by a single state vector, while a mixed state is a statistical ensemble of pure states; the density matrix represents both.
Pure and Remote View of Streams and Mountains
Streams and Mountains, Clear and Distant (溪山清遠圖) is a long Southern Song landscape handscroll attributed to Xia Gui, held in the National Palace Museum, Taipei.
Pure autonomic failure
Pure autonomic failure (Bradbury-Eggleston syndrome, PAF) is a rare sporadic alpha-synucleinopathy causing neurogenic orthostatic hypotension from postganglionic sympathetic degeneration, with low supine norepinephrine and about 5% yearly phenoconversion to Parkinson's, MSA, or Lewy body dementia.
Pure Country
Pure Country (1992) is a Warner Bros. drama directed by Christopher Cain, starring country singer George Strait in his film debut as superstar Dusty Chandler, who leaves his glitzy arena tour for his Texas roots; its soundtrack hit No. 1 and sold over 6 million copies.
Pure Data
Pure Data (Pd) is a free, open-source visual programming environment for real-time music, audio, and multimedia, created by Miller Puckette around 1996 as an open-source rewrite of his earlier program Max.
Pure Data Centres
Pure Data Centres Group (Pure DC) is a UK-headquartered developer of hyperscale cloud and AI data centers, founded in 2013 and owned by Oaktree Capital Management.
PurE domain
PurE domain (InterPro IPR000031): conserved domain of phosphoribosylaminoimidazole carboxylase enzymes in de novo purine biosynthesis. Bacterial PurE mutases convert N5-CAIR to CAIR, unlike the human bifunctional PAICS, making PurE an antibiotic target.
Pure Ecstasy
Pure Ecstasy is the sixth studio album by Ohio metalcore band Beartooth, released August 28, 2026 on Fearless Records. Eleven tracks co-produced by Caleb Shomo and Jordan Fish, written around Shomo's coming out as a gay man.
Pure Food and Drug Act
The Pure Food and Drug Act of 1906 (Wiley Act) was the first U.S. federal law banning interstate commerce in adulterated or misbranded foods, drinks, and drugs, signed by Theodore Roosevelt, enforced by the Bureau of Chemistry, and repealed by the 1938 FD&C Act.
Pure function
A pure function is a function that only performs a calculation, never changing existing state and always returning the same result, enabling testing, caching, and compiler optimization.
Pure fusion weapon
A pure fusion weapon, also called a pure fusion bomb, is a hypothetical nuclear weapon deriving its explosive yield entirely from fusion, without a fission trigger or fissile material.
Pure Genius
Pure Genius (CBS, 2016-2017) is a Jason Katims medical drama about Silicon Valley billionaire James Bell's free Palo Alto hospital, starring Augustus Prew and Dermot Mulroney; canceled after one 13-episode season.
Pure Guava
Pure Guava (1992) is Ween's third album and Elektra Records major-label debut: 19 lo-fi, pitch-shifted-vocal songs recorded on a four-track at "The Pod" apartment, led by the modern rock hit "Push th' Little Daisies" and selling about 200,000 copies.
Pure hair and nail ectodermal dysplasia
Pure hair and nail ectodermal dysplasia (PHNED) is a rare congenital disorder marked by dystrophic nails and severe scalp hypotrichosis, with known causative genes KRT85, KRT74, and HOXC13.
Pure Harvest Smart Farms
Pure Harvest Smart Farms is an Abu Dhabi agritech company founded in 2016 by Sky Kurtz and Robert Kupstas, growing vegetables in climate-controlled desert greenhouses.
Pure Heroine
Pure Heroine is the 2013 debut studio album by New Zealand singer-songwriter Lorde (Ella Yelich-O'Connor), co-written and produced by Joel Little; it debuted at number three on the US Billboard 200, sold over five million copies, and launched the Grammy-winning hit "Royals".
Pure Imagination
Pure Imagination: song by Leslie Bricusse and Anthony Newley for the 1971 film Willy Wonka & the Chocolate Factory, sung by Gene Wilder; written in one day, famous only after 1980s TV reruns, reused with new lyrics in Wonka (2023).
Pure Land Buddhism
Pure Land Buddhism, or Jingtuzong, is a Mahāyāna Buddhist tradition spanning China, Korea, and Japan, centered on reciting Amitābha's name for rebirth in his Pure Land.
Pure Land Buddhism in Goryeo
Pure Land Buddhism in Goryeo was the dominant faith of the Goryeo dynasty (918–1392), directed at rebirth in Amitābha's Pure Land; unlike in China it never formed an independent order.
Pure Land school
The Pure Land school (净土宗) was a Tang-dynasty Buddhist movement devoted to rebirth in Amitabha's pure land through reciting his name, shaped by the master Shandao (613 to 681).
Pure mathematics
Pure mathematics is mathematics pursued for its own sake rather than immediate application, covering fields like algebra, number theory, and analysis, whose results often become applied later.