All articles starting with P
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Pi Mensae
HD 39091 (Pi Mensae, π Men) is a naked-eye G0V star 18.3 pc away hosting three planets: eccentric giant π Men b (2001), TESS's first transiting super-Earth π Men c (2018), and Neptune-mass π Men d (2022).
Pi Mensae c
Pi Mensae c (π Men c) is a super-Earth to sub-Neptune exoplanet orbiting the star Pi Mensae about 60 light-years away, announced in 2018 as the first transiting planet discovered by TESS.
Pi network (electronics)
A pi network is a three-element impedance-matching circuit, with two shunt reactive elements around one series element, that lets the designer set Q independently of the impedance ratio.
Pi Rixiu
Pi Rixiu (皮日休), courtesy name Ximei, was a late Tang dynasty poet and essayist from Xiangyang, Hubei, known for socially critical verse and his exchange poetry with Lu Guimeng.
Pi Scorpii
Pi Scorpii, traditionally called Fang (房), is a triple star system about 500 light-years away in Scorpius, visible as a single star of magnitude 2.91.
Pi Ventures
pi Ventures is a Bengaluru-based early-stage venture capital firm founded in 2016 by Manish Singhal and Umakant Soni, backing about 35 Indian deep-tech startups across two funds.
Pi-hole
Pi-hole is a free, open-source network-level ad blocker that works as a DNS sinkhole, blocking ads and trackers on all devices, typically installed on a Raspberry Pi.
Pi-Sekhemkheperre
Pi-Sekhemkheperre, also written Per-Sekhemkheperre, was a walled royal town and stronghold at the mouth of the Fayum in Upper Egypt, built by Osorkon I of the 22nd Dynasty.
Pi-stacking
Pi-stacking, also written π–π stacking, is the attractive noncovalent association between aromatic rings. Despite its name, neutral rings favor T-shaped and parallel-displaced geometries over face-to-face stacking.
Pi-system
A pi-system (Π-system) is a collection of subsets of a set closed under finite intersections; a workhorse of measure-theoretic probability, it powers Dynkin's pi-lambda theorem and uniqueness of measures.
Pi'erre Bourne
Pi'erre Bourne (Jordan Jenks, born 1993) is an American producer and rapper from Columbia, South Carolina, behind Playboi Carti's "Magnolia" and 6ix9ine's "Gummo", known for video-game-style trap melodies, his Jamie Foxx Show producer tag, and The Life of Pi'erre albums.
Pi'tati
Pi'tati (Pítati), from Egyptian pḏtyw meaning archer troops, were Nubian archer contingents in Egyptian service, requested by Canaanite vassal kings in the Amarna letters of the mid-14th century BC.
Pi1 Ursae Majoris
Pi1 Ursae Majoris (Pi1 UMa) is a near-solar G-type dwarf star in Ursa Major about 47 light years away, a rapidly rotating, flaring BY Draconis variable.
PI3
PI3 (peptidase inhibitor 3) is a human gene on chromosome 20 that encodes elafin, a secreted inhibitor of neutrophil serine proteases that also acts as an antimicrobial peptide.
Pi3 Orionis
Pi3 Orionis, also known as Tabit, is an F-type main-sequence star in the constellation Orion about 26.3 light-years away, shining at magnitude 3.19 and visible to the naked eye.
PI3K/AKT activation
PI3K/AKT activation is the signaling sequence in which PI3K converts PIP2 to PIP3, recruiting AKT and PDK1 to the membrane for dual phosphorylation by mTORC2 and PDPK1. Also called PI3K/AKT signaling, it regulates survival, growth, and metabolism and is among the most frequently altered pathways in cancer.
PI3K/AKT/mTOR pathway
PI3K/AKT/mTOR (PAM) pathway: intracellular signaling cascade regulating cell proliferation, survival, and metabolism; frequently dysregulated in cancer via PIK3CA mutation or PTEN loss; targeted by rapalogs, PI3K, AKT, and dual inhibitors.
Pía Adriasola
María Pía Adriasola Barroilhet (born 1967) is a Chilean lawyer and First Lady of Chile since 11 March 2026, wife of President José Antonio Kast, mother of nine children, founder of Fundación Cuide Chile, and restorer of the First Lady's cabinet and role.
Pia Cramling
Pia Cramling, Swedish chess grandmaster (born 1963), fifth woman to earn the GM title (1992), topped the women's rating list in 1984, European champion 2003 and 2010, World Chess Hall of Fame 2025.
Pia Dandiya
Pia Dandiya is an American Democratic politician and educator, the party's nominee for the US House in Florida's 22nd congressional district in the 2026 election.
Pia Guerra
Pia Guerra is a Canadian American comics artist and editorial cartoonist, born in 1971, known as co-creator of Y: The Last Man and a 2023 Pulitzer Prize finalist.
Pia Hansen
Pia Hansen (Pia Carina Hansen), Swedish sport shooter born 1965 in Ignaberga, Hässleholm; won women's double trap gold at Sydney 2000 with an Olympic record 148, ninth in both events at Athens 2004.
Pia Lindström
Pia Lindström (Friedel Pia Lindström, born 1938) is a Swedish-American journalist and actress, daughter of Ingrid Bergman, WNBC-TV news anchor and Emmy-winning film and theater critic in New York.
Pia Mia
Pia Mia is a Guam-born American singer whose 2015 single Do It Again became an international hit; she later founded Cherry Pie Records and released Anti Romantica in 2024.
Pia Miranda
Pia Miranda (born 1973) is an Australian actor, best known as Josie Alibrandi in Looking for Alibrandi (2000), which won her the 2000 AFI Award for Best Actress; she also won Australian Survivor 2019 and wrote the memoir Finding My Bella Vita.
Pia Olsen Dyhr
Pia Olsen Dyhr is a Danish politician who leads the Green Left party and has been Minister for Economic and Interior Affairs since June 2026.
Pia Tafdrup
Pia Tafdrup is a Danish poet and member of the Danish Academy, born in Copenhagen in 1952, who won the Nordic Council Literature Prize in 1999.
Pia Toscano
Pia Toscano (born 1988) is an American singer from Queens, New York, who placed ninth on American Idol season 10 in 2011, signed with Interscope, and now tours with Bocelli, Foster, and Lopez.
Pia Whitesell
Pia Whitesell, born Pia Loyola Blanco in 1983 and formerly known as Pia Miller, is a Chilean-born Australian model, actress and entrepreneur known for Home and Away's Katarina Chapman, Dora and the Lost City of Gold, beauty ambassadorships, and her 2021 marriage to agent Patrick Whitesell.
Pia Wurtzbach
Pia Wurtzbach (Pia Alonzo Wurtzbach Jauncey), German-Filipino model and Miss Universe 2015, crowned December 20, 2015 in Las Vegas after Steve Harvey's misannouncement; third Filipina winner, UNAIDS Goodwill Ambassador, first Filipino Bvlgari ambassador.