All articles starting with P
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Psychotic depression
Psychotic depression (delusional depression): major depression with delusions or hallucinations, often mood-congruent guilt, poverty, or nihilism. Treated with antidepressant plus antipsychotic or ECT; ECT is highly effective.
Psychotria
Psychotria L. (synonyms Cephaelis, Mapouria) is a pantropical genus of understory Rubiaceae shrubs with about 1,600-1,800 species, heterostylous flowers, red drupes, and bacterial leaf nodules; once broader, now split among Palicourea, Eumachia and others.
Psychotria viridis
Psychotria viridis (chacruna), a Rubiaceae shrub from Mexico to tropical South America, is the DMT-containing leaf ingredient of ayahuasca, containing 1–1.6 mg DMT per gram of dry leaf; often confused with the alkaloid-free P. carthagenensis.
Psychoville
Psychoville is a BBC Two dark comedy mystery (2009–2011) created by and starring Steve Pemberton and Reece Shearsmith, whose characters receive letters reading "I know what you did"; two series plus a 2010 Halloween special.
PsychoYP
PsychoYP, born Nicholas Ihua-Maduenyi, is a Nigerian rapper and singer from Abuja who leads the new wave of Nigerian hip hop and fronts the collective Apex Village.
Psychro-piezophilic archaea
Psychro-piezophilic archaea are archaea adapted to low temperature and high pressure in the deep cold ocean, though no cold-adapted archaeal piezophile has yet been cultured.
Psychrobacter
Psychrobacter, genus of cold-adapted Gram-negative Moraxellaceae bacteria (type species P. immobilis, Juni and Heym 1986) found in sea ice, permafrost, and chilled foods; low spoilage potential, grows as low as −10°C.
Psychrometric chart
A psychrometric chart is a graph of the thermodynamic properties of moist air, relating temperature, humidity, and enthalpy for air-conditioning design; Willis Carrier created it in 1904.
Psychrometrics
Psychrometrics is the branch of physics that studies the thermodynamic properties of moist air, the mixture of dry air and water vapor, and underlies air-conditioning design and drying.
Psychrophile
Psychrophiles (cryophiles) are cold-loving extremophilic bacteria and archaea with optimal growth at about 15°C or lower, maximum about 20°C, and growth at 0°C or below, distinguished from psychrotrophs, which grow in the cold but prefer warmer optima.
Psychrophilic archaeal habitats
Psychrophilic archaeal habitats are the permanently or seasonally cold environments, generally below 5 °C, where archaea live and sometimes dominate, including polar seas, sea ice, permafrost, and hypersaline Antarctic lakes.
PsycINFO
PsycINFO, also called APA PsycInfo, is a bibliographic database of psychology and the behavioral sciences produced by the American Psychological Association, offered electronically since 1967.
Psyduck (コダック)
Psyduck (コダック), Pokémon No. 0054, the Duck Pokémon: a Water-type, platypus-like creature by Ken Sugimori, 0.8 m, 19.6 kg, abilities Damp and Cloud Nine, evolving into Golduck; famous for its headache-triggered powers and Misty's anime Psyduck.
Psyduck music festival massacre
Psyduck music festival massacre: killing of attendees of Psyduck, an unofficial ~100-person trance rave between Kibbutzim Nir Oz and Nirim near Gaza, during the 7 October 2023 Hamas attack; 16 or 17 killed fleeing on roads, none at the site.
Psygnosis
Psygnosis Limited, British video game developer and publisher founded 1984 in Liverpool by Hetherington, Ellis, and Lawson; published Lemmings and Wipeout, acquired by Sony 1993, renamed Studio Liverpool, closed 2012.
Psyiconic
Psyiconic is the online alias of Kelon Campbell (born 1995), an American TikTok comedian from Humble, Texas, known for improvised livestream character comedy, especially the Southern Christian persona Terri Joe, and the 2026 Tubi film Terri Joe: Missionary in Miami.
Psykotic
Psykotic is the third studio album by American rapper OsamaSon, released on October 10, 2025, a 17-song trap record in the rage subgenre that reached number 81 on the Billboard 200.
Psylli
The Psylli (Greek Ψύλλοι) were an ancient Libyan people of the Greater Syrtis coast, famed in Greek and Roman tradition for immunity to snake venom.
Psyllidae
Psyllidae, jumping plantlice, a family of Psylloidea (Hemiptera: Sternorrhyncha): 2–8 mm sap-sucking insects on woody dicots, five nymphal instars, backward-jumping adults, some vectoring plant pathogens.
Psyllium
Psyllium, also known as isabgol or ispaghula, is the gel-forming husk fiber of the plant Plantago ovata, used as a bulk laxative and to lower cholesterol.
Psylocke
Psylocke is a Marvel Comics X-Men codename held by Betsy Braddock and later Kwannon, telepathic mutants linked by a 1993 body-swap retcon; Kwannon is the current Psylocke, Betsy is Captain Britain.
Psyonix
Psyonix is a San Diego video game developer founded in 2001 by Dave Hagewood, creator of Rocket League (2015) and its 2008 predecessor SARPBC; acquired by Epic Games in 2019, now moving Rocket League to Unreal Engine 6.
PT 109 (film)
PT 109 (1963) is a Warner Bros. war drama directed by Leslie H. Martinson, starring Cliff Robertson as Lt. John F. Kennedy; the first theatrical film about a sitting U.S. president, released June 19, 1963.
Pt Adaro Andalan Indonesia
PT Adaro Andalan Indonesia Tbk is an Indonesian thermal coal mining holding company, spun off from Adaro Energy and listed on the Indonesia Stock Exchange in December 2024.
PT Adaro Energy Indonesia
PT Adaro Energy Indonesia Tbk, listed on the Indonesia Stock Exchange from 2008, was Indonesia's largest coal producer until its 2024 split into Adaro Andalan Indonesia and Alamtri Resources.
PT Adaro Indonesia
PT Adaro Indonesia is an Indonesian thermal coal mining company producing low-sulfur Envirocoal from open-cut mines in South Kalimantan since 1992, acquired in 2005 by PT Alam Tri Abadi.
PT Arutmin Indonesia
PT Arutmin Indonesia is an Indonesian coal mining company with five mines and a coal terminal in South Kalimantan, producing up to 20 million tons of coal per year.
PT Berau Coal
PT Berau Coal is an Indonesian thermal coal mining company operating open cut mines in East Kalimantan since 1983, described as the country's fifth-largest thermal coal producer.
PT boat
A PT boat was a small, fast, wooden motor torpedo boat used by the United States Navy in World War II, armed with torpedoes for harassing enemy forces.
PT Borneo Indobara
PT Borneo Indobara is an Indonesian open-pit coal mining company operating a large concession in Tanah Bumbu Regency, South Kalimantan, as part of the Sinarmas Mining Group.