All articles starting with D
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Deep South
The Deep South is a US subregion usually defined as Alabama, Georgia, Louisiana, Mississippi, and South Carolina, historically the cotton-kingdom heart of slavery and later of desegregation resistance.
Deep Space 1
Deep Space 1 was a NASA spacecraft launched in 1998 as the first New Millennium Program mission, testing ion propulsion and flying by asteroid Braille and comet Borrelly.
Deep Space Atomic Clock
The Deep Space Atomic Clock (DSAC) was a NASA technology demonstration of a small, ultra-precise mercury-ion atomic clock, operated in Earth orbit from 2019 to 2021.
Deep Space Climate Observatory
The Deep Space Climate Observatory, also known as DSCOVR or Triana, is an American spacecraft at the Sun-Earth L1 point, launched in 2015 to monitor solar wind and image Earth.
Deep Space Network
The Deep Space Network (DSN) is NASA's worldwide array of radio antennas for communicating with interplanetary spacecraft, managed by JPL and organized at three complexes: Goldstone, Madrid, and Canberra.
Deep Springs College
Deep Springs College is a two-year liberal arts college founded in 1917. It is located on a California ranch and focuses on academics, self-governance, and manual labor.
Deep stall
A deep stall, also known as a superstall or superstick, is a prolonged or unrecoverable stall in which the stalled wing's turbulent wake blanks the horizontal tail, leaving elevators ineffective, chiefly on T-tail aircraft.
Deep state
Deep state, from Turkish derin devlet, denotes alleged unelected networks of security and bureaucratic actors operating against elected leadership; coined in 1990s Turkey, later a US political and conspiracy-theory term.
Deep State (TV series)
Deep State is a 2018–2019 British Fox/EPIX espionage thriller by Matthew Parkhill and Simon Maxwell, starring Mark Strong then Walton Goggins; distinct from the unrelated 2023 Kuwaiti Netflix series The Deep State.
Deep state conspiracy theory in the United States
Deep state conspiracy theory in the United States: belief that unelected military, intelligence, and bureaucratic officials secretly control policy and undermine elected leaders, especially Trump. Term from Turkish derin devlet, brought to America by Peter Dale Scott, central to QAnon.
Deep strike campaign
Ukraine's deep strike campaign: long-range drone and missile attacks on targets inside Russia since early 2024, also called strategic interdiction, centered on oil refineries, export nodes, airfields, and the Black Sea Fleet.
Deep structure and surface structure
Deep structure and surface structure are two syntactic representation levels in Chomsky's transformational generative grammar: an abstract level of grammatical relations and the phonologically close surface form, linked by transformations; deep structure was the 1965 locus of semantic interpretation and was later abandoned in minimalism.
Deep subsurface geothermal habitats of hyperthermophilic archaea
Deep subsurface geothermal habitats of hyperthermophilic archaea are below-ground thermal environments, from oceanic crust to deep sediments, where heat-loving archaea live at up to about 120°C.
Deep Synoptic Array
The Deep Synoptic Array is a planned Caltech-led radio telescope of 1,650 dishes in Nevada, designed to survey the sky and detect over a billion radio sources.
Deep Thoughts (Lil Durk album)
Deep Thoughts is a 2025 studio album by American rapper Lil Durk, released March 28, 2025 on Only the Family, Alamo, and Sony; it debuted at No. 3 on the Billboard 200 with 64,000 units while Durk was jailed.
Deep Throat (film)
Deep Throat (1972) is an American hardcore pornographic feature directed by Gerard Damiano, starring Linda Lovelace, that launched porno chic, grossed a debated $600 million, was banned in 23 states, and gave the Watergate informant his codename.
Deep Throat (The X-Files)
Deep Throat is a recurring X-Files character played by Jerry Hardin: a shadowy CIA-linked informant who feeds classified information to Fox Mulder, named for the Watergate source, killed in the season 1 finale with the words "Trust no one".
Deep Throat (Watergate)
Deep Throat was the code name of the Watergate anonymous source for Woodward and Bernstein, revealed in 2005 as former FBI deputy director W. Mark Felt; his garage meetings helped expose the Nixon cover-up.
Deep time
Deep time is the concept that Earth's history spans billions of years beyond human intuition. John McPhee coined the phrase in 1981; the idea traces to James Hutton.
Deep transcranial magnetic stimulation
Deep transcranial magnetic stimulation (dTMS) is a form of transcranial magnetic stimulation using helmet-like coils that reach deeper brain regions, cleared for depression, OCD, and smoking cessation.
Deep Tropics Music, Art, and Style Festival
Deep Tropics is a sustainability-focused electronic dance music festival in Nashville, Tennessee, founded in 2017 by twin brothers Blake and Joel Atchison, growing to 15,000 attendees by 2025.
Deep ultraviolet lithography
Deep ultraviolet (DUV) lithography is a photolithography technique that patterns integrated circuits using 248 nm KrF and 193 nm ArF excimer lasers, long the leading chipmaking technology.
Deep Underground Neutrino Experiment
The Deep Underground Neutrino Experiment (DUNE) is an international neutrino experiment that will send a beam 1,300 km underground from Fermilab in Illinois to liquid-argon detectors at the Sanford Underground Research Facility in South Dakota.
Deep unfolding network
A deep unfolding network, also called an unrolled network, is a neural network built by unrolling an optimization algorithm's iterations into layers with learnable parameters, used mainly for inverse problems like MRI reconstruction.
Deep vein thrombosis
Deep vein thrombosis (DVT) is a blood clot in a deep vein of the leg, pelvis, or arm, part of venous thromboembolism; diagnosed by duplex ultrasound, treated with anticoagulants, and complicated by pulmonary embolism and post-thrombotic syndrome.
Deep Water (2022 film)
Deep Water (2022) is an erotic thriller directed by Adrian Lyne, starring Ben Affleck and Ana de Armas, adapted from Patricia Highsmith's 1957 novel and released on Hulu on March 18, 2022 after its theatrical release was canceled.
Deep Water (2026 film)
Deep Water (2026) is a Renny Harlin survival thriller, a shark disaster film, starring Aaron Eckhart and Ben Kingsley as pilots of a Los Angeles to Shanghai flight that ditches in shark-infested Pacific waters; produced by Gene Simmons, released May 1, 2026, grossing about $8 million.
Deep Water (TV series)
Deep Water (2016 SBS miniseries, distinct from the 2019 British Lake District drama): four-part Australian crime drama by Blackfella Films, directed by Shawn Seet, starring Yael Stone and Noah Taylor, inspired by 1980s–90s Sydney gay hate murders, paired with the documentary Deep Water: The Real Story.
Deep web
The deep web, also called the invisible web or hidden web, is the part of the World Wide Web not indexed by standard search engines, including password-protected and database-driven pages.
Deep well injection
Deep well injection disposes of liquid waste by pumping it into porous rock thousands of feet below drinking water aquifers, regulated in the US as Class I wells.