All articles starting with P
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Pump and dump
Pump and dump, also called ramp and dump, is securities fraud in which promoters inflate an asset's price with false statements, then sell into the inflated market; it targets microcap stocks and cryptocurrencies and is banned under US, UK, and EU market-abuse rules.
Pump as turbine
A pump as turbine (PAT) is a standard hydraulic pump operated in reverse so pressurized water drives the impeller, turning the motor into a generator for micro-hydropower.
Pump It
Pump It is a 2005 Black Eyed Peas song from Monkey Business, also an international 2006 single, built on a sample of Dick Dale's 1962 surf-rock recording Misirlou, later famous from Pulp Fiction.
Pump It Up (펌프 잇 업) (video game series)
Pump It Up (펌프 잇 업) is Andamiro's Korean five-panel arcade dance rhythm game series, debuting August 1999 with The 1st Dance Floor; known for diagonal-plus-center pads, freestyle culture, World Pump Festival tournaments, and the 2026 PHOENIX 2 installment.
Pump laser
A pump laser is a laser, most often a semiconductor diode, that excites a gain medium such as erbium-doped fiber, enabling optical amplifiers and fiber lasers to work.
Pump organ
Pump organ, also called reed organ or harmonium: a free-reed keyboard instrument sounded by hand- or foot-pumped bellows; pressure-wind European harmoniums and suction-wind American organs, heyday 1850–1950.
Pump Restaurant
Pump Restaurant, often styled PUMP, was a restaurant, bar, and lounge in West Hollywood co-owned by Lisa Vanderpump and Ken Todd from 2014 to 2023.
Pump sump
A pump sump is the reservoir, or lower portion of a wet well, from which a pump draws water, designed to deliver steady, swirl-free flow to the pump suction inlet.
Pump Up the Jam
Pump Up the Jam: 1989 Belgian house/hip-house hit by Technotronic, produced by Jo Bogaert, vocals by Ya Kid K, lip-synced by model Felly; No. 2 in the UK and US, Eurodance pioneer.
Pump Up the Volume (film)
Pump Up the Volume is a 1990 American coming-of-age drama written and directed by Allan Moyle, starring Christian Slater as a shy Arizona teenager who runs a pirate radio station from his parents' basement.
Pump-and-treat
Pump-and-treat (P&T) is a groundwater remediation method that pumps contaminated water from wells to an above-ground treatment system; it has been used at over 800 US Superfund sites.
Pump-controlled actuator
A pump-controlled actuator is a hydraulic actuator, most often a cylinder, whose speed and force are set by varying the flow its pump delivers rather than by throttling valves.
Pump-jet
A pump-jet, also called a hydrojet, is a marine propulsion device that accelerates water through a ducted rotor and stator, widely fitted to submarines and torpedoes.
Pump–probe spectroscopy
Pump–probe spectroscopy, also called transient absorption spectroscopy, is a two-pulse optical technique in which a pump pulse excites a sample and a delayed probe pulse measures its time-dependent response.
Pump.fun
Pump.fun is a Solana blockchain launchpad, live since January 2024, that lets anyone create a tradeable token in minutes; it deployed 5.3 million tokens in 2024.
Pumped fluid loop thermal control
Pumped fluid loop thermal control is an active spacecraft thermal control technique in which a pump circulates fluid to collect heat and reject it at a radiator.
Pumped thermal electricity storage
Pumped thermal electricity storage (PTES), also called pumped heat energy storage (PHES), stores grid electricity as heat in cheap materials like rocks or molten salts, then reconverts it with a heat engine.
Pumped Up Kicks
Pumped Up Kicks is the 2010 debut single by American indie pop band Foster the People, written by Mark Foster. Its upbeat sound contrasts with lyrics narrating a troubled teen planning a shooting; it peaked at No. 3 on the Billboard Hot 100.
Pumped-storage hydroelectricity
Pumped-storage hydroelectricity (PSH), also known as pumped hydro storage, is a form of hydroelectric energy storage that pumps water uphill and releases it through turbines to generate power.
Pumpernickel
Pumpernickel: dense, dark Westphalian German rye bread baked 16+ hours, EU PGI-protected since 2014; distinct from American wheat-rye pumpernickel; name from Westphalian dialect insult (1663).
Pumping Iron
Pumping Iron is a 1977 American documentary by George Butler and Robert Fiore, based on the 1974 Gaines-Butler book, following Arnold Schwarzenegger, Lou Ferrigno, and others toward the 1975 Mr. Olympia in Pretoria; partly staged, it launched Schwarzenegger's film career.
Pumping lemma for context-free languages
The pumping lemma for context-free languages, also called the Bar-Hillel lemma, is a theorem proved by Bar-Hillel, Perles, and Shamir in 1961, used chiefly to prove languages are not context-free.
Pumping lemma for regular languages
The pumping lemma for regular languages, stated by Bar-Hillel, Perles, and Shamir in 1961, says long strings of a regular language can be pumped and stays used to prove non-regularity.
Pumping losses
Pumping losses, also called gas-exchange losses, are the work a piston engine expends moving gases through intake and exhaust strokes instead of producing useful output.
Pumping station
A pumping station, also called a pump station or pump house, houses pumps that move water, sewage, or other liquids between elevations or pressure zones.
Pumping test
A pumping test pumps a well at a regulated rate while measuring water levels in observation wells to estimate aquifer properties such as transmissivity and storativity.
Pumpjack
A pumpjack, also known as a horsehead pump or nodding donkey, is the surface machine that drives a plunger pump to lift oil from a well.
Pumpkin
Pumpkin: large edible fruit of Cucurbita pepo, maxima, and moschata; culinary term, not taxonomic. Domesticated in Mexico and eastern North America ~10,000 B.P.; 2025 U.S. output 1.47 billion lb, Illinois leading.
Pumpkin pie
Pumpkin pie is an American spiced pumpkin custard baked in a crust, the classic Thanksgiving dessert. Its custard form dates to Amelia Simmons's 1796 American Cookery; it was promoted by Sarah Josepha Hale and is now made mostly with Illinois canned pumpkin.
Pumpkin pie spice
Pumpkin pie spice is a cinnamon-led blend of cinnamon, ginger, nutmeg, and allspice, sometimes clove, with no pumpkin in it; marketed since 1931, made famous by Starbucks's 2003 latte.