All articles starting with P
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Picos de Europa Biosphere Reserve
Picos de Europa Biosphere Reserve, a UNESCO MAB site designated 10 July 2003 in Asturias, Cantabria, and León, Spain, covering about 63,642 ha around Spain's first national park (1918), with 1.8-2.0 million annual visitors.
Picosecond
A picosecond (symbol ps) is one trillionth of a second, an SI unit used for ultrashort laser pulses, fast electronics, and picosecond-resolution timing in PET medical imaging.
Picosulfuric acid
Picosulfuric acid (picosulfate, sodium picosulfate; C18H15NO8S2) is a diphenylmethane stimulant laxative prodrug activated by colonic bacteria to BHPM, used in Picolax/CLENPIQ bowel-cleansing combinations for colonoscopy.
Picotron
Picotron is a fantasy workstation by Lexaloffle Games, the studio behind PICO-8, for making pixel-art games, animations, music, and demos on Windows, macOS, or Linux.
Picovax
Picovax (IPV-Al AJV) is a trivalent aluminium-adjuvanted reduced-dose inactivated polio vaccine by AJ Vaccines, Denmark; licensed 2019, WHO prequalified 21 April 2020, non-inferior to standard IPV in infants.
Picoxystrobin
Picoxystrobin, a strobilurin QoI (FRAC Code 11) methoxy-acrylate fungicide discovered by Syngenta and transferred to DuPont, inhibits complex III at the Qo site; EU approval was not renewed in 2017 over unresolved genotoxicity.
Picric acid
Picric acid, also known as 2,4,6-trinitrophenol, is a strongly acidic nitrophenol used historically as a synthetic dye and the standard shell filling for artillery until modern laboratory use.
Picris
Picris (oxtongues) is a genus of 46 accepted species of Asteraceae herbs in tribe Cichorieae, subtribe Hypochaeridinae, named by Linnaeus in 1753, native to the temperate and subtropical Old World and Australia, with P. hieracioides as type species.
Picrophilus
Picrophilus (P. oshimae, P. torridus) is a genus of hyperacidophilic, thermophilic archaea from Japanese solfataric fields, growing optimally at pH 0.7 and 60 °C, the most extreme acidophiles known, type of family Picrophilaceae.
Picsart
Picsart, also known as PicsArt Photo Studio, is an AI media platform for photo and video editing, design, and a creative community, founded in Armenia in 2011.
Pictet–Spengler reaction
The Pictet–Spengler reaction is an acid-promoted cyclocondensation in which a β-arylethylamine and an aldehyde or ketone form tetrahydroisoquinolines and tetrahydro-β-carbolines, key alkaloid scaffolds; reported by Pictet and Spengler in 1911.
Pictionary
Pictionary is a team party board game in which one player sketches a word while teammates guess it, created by Rob Angel and launched in 1985.
Pictish language
The Pictish language, extinct by about the tenth century in eastern and northern Scotland, was likely a Brittonic (P-Celtic) Celtic language related to Welsh, though some scholars posit a non-Celtic tongue; known from place-names like pit-, names, and undeciphered ogham inscriptions.
Pictogram
Pictogram: a simplified pictorial sign conveying an object, action, or idea at a glance without text. Also called pictograph; distinct from ideograms and logograms; used in signage, ISO 7001/9186 standards, and accessibility symbols like the ISA.
Pictonico!
Pictonico! is Nintendo's free-to-start mobile microgame app (iOS/Android, May 28, 2026), developed by Intelligent Systems, that turns phone photos into up to 80 WarioWare-style minigames; photos stay on-device, with paid Volume Packs at $7.99 and $5.99.
Pictorialism
Pictorialism was an international art photography movement, active from the 1880s to around 1914, whose camera clubs used soft focus and painterly techniques to establish photography as a fine art.
Picts
The Picts (Picti) were the peoples of northern Britain, named by Rome in the late third century, known for symbol stones, contested ogham inscriptions, and the 685 Battle of Dun Nechtain.
Picture (song)
"Picture" is a 2002 country-rock duet by Kid Rock and Sheryl Crow from the album Cocky; after A&M blocked Crow's vocals, an Allison Moorer version went to radio, but the Crow version hit No. 4 on the Hot 100.
Picture book
A picture book is a book, typically for young children, in which profusely supplied illustrations are essential to understanding the story, with roots in John Locke's 1693 educational writings.
Picture Capital
Picture Capital is a venture capital firm founded in 2024 by Mickey Boodaei, Dan Amiga, Rakesh Loonkar, and Mike Fey that invests in high-tech Israeli businesses.
Picture disc
Picture disc: a vinyl record with printed artwork embedded between clear vinyl layers, grooves pressed into the thin top layer. Also called pic-disc; dates to 1920s Musika Postkarte, peaked with Vogue discs (1946-1947) and 1970s promo pressings; collectible but noisier than black vinyl.
Picture Exchange Communication System
The Picture Exchange Communication System (PECS) is an augmentative communication intervention, developed in the United States for Autistic learners, that teaches requesting through six phases of picture-card exchange.
Picture naming task
The picture naming task, also called object naming, is an experimental paradigm in which a participant names a depicted object aloud while reaction time and errors are measured.
Picture Perfect (1997 film)
Picture Perfect is a 1997 American romantic comedy directed by Glenn Gordon Caron, in which Jennifer Aniston plays a New York advertising executive who invents a fiancé to win a promotion.
Picture superiority effect
Picture superiority effect (PSE): memory phenomenon, also called dual-coding advantage, in which pictures are remembered better than words. Named in Paivio & Csapo's 1973 work; distinctiveness experiments eliminated it in recognition.
Picture This (2025 film)
Picture This is a 2025 British romantic comedy on Prime Video, directed by Prarthana Mohan, written by Nikita Lalwani, starring Simone Ashley and Hero Fiennes Tiffin; a remake of the 2024 Australian film Five Blind Dates about a London photographer told love awaits in her next five dates.
Picture window
A picture window is a large, usually fixed single-pane window with few or no glazing bars, placed to frame an attractive exterior view rather than to open for ventilation.
Picture-in-picture
Picture-in-picture (PIP) is a display feature that shows one video source in a small window overlaid on a larger main image, letting viewers watch two programs at once.
Pictured Rocks National Lakeshore
Pictured Rocks National Lakeshore, America's first national lakeshore (authorized 1966), protects 73,236 acres of mineral-stained sandstone cliffs, dunes, and waterfalls along 42 miles of Lake Superior in Alger County, Michigan.
Picturephone
The Picturephone was a Bell System videotelephone service developed by Bell Labs, launched commercially in Pittsburgh in 1970 and withdrawn in 1973 after few subscribers.