All articles starting with D
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Defunct denominational schools in Australia and New Zealand
Defunct denominational schools in Australia and New Zealand are Catholic, Anglican, and other-faith schools that closed permanently, through enrollment decline, loss of religious-order teachers, or deliberate church policy.
Defunct denominational schools in Hong Kong
Defunct denominational schools in Hong Kong are religious schools that have ceased operation. Canossa Sacred Heart Business College, founded in 1905, closed in 2013 due to low enrollment.
Defunct denominational schools in Latin America and the Caribbean
Defunct denominational schools in Latin America and the Caribbean closed in two waves: Cuba nationalized religious schools after 1959, while congregations elsewhere closed schools over falling vocations and enrollment.
Defunct esports organizations
Defunct esports organizations are professional competitive-gaming teams and brands that ceased operations through bankruptcy, acquisition, or dissolution, including TSM, FaZe Clan, Astralis, RNG, and Guild Esports.
Defunct horse racing venues
Defunct horse racing venues are permanently closed racecourses, as US thoroughbred tracks have fallen to roughly 75 from more than 300 in the late 1800s.
Defunct mission schools in India
Defunct mission schools in India are Christian mission-affiliated schools that have closed, including Vincent Hill School in Mussoorie, closed in 1969, and Mission High School Dalwal, nationalized in 1972.
Defunct newspapers of Europe
Defunct newspapers of Europe surveys notable closed titles and why they died, from the loss of classified advertising to political closures in Hungary, Turkey, and Russia.
Defunct newspapers of Oceania
Defunct newspapers of Oceania are the newspapers of Australia, New Zealand, and the Pacific islands that have ceased publication, spanning colonial broadsheets of the 1840s to twentieth-century island titles.
Defunct newspapers of the United States
Defunct newspapers of the United States: American papers that ceased publishing, mostly local dailies and weeklies. Titles fell from 7,325 in 2005 to 4,490, creating news deserts and documented civic harms.
Defunct public schools in the United States
Defunct public schools in the United States are publicly funded schools that have permanently ceased operation, illustrated by cases like Alabama's Randolph County Training School, closed by desegregation order in 1970.
Defunct states at the Universiade
Defunct states at the Universiade covers former competitors such as the Soviet Union, Czechoslovakia, Yugoslavia, and East Germany, whose results FISU still lists under their own discontinued codes.
Defunctionalization
Defunctionalization is a whole-program transformation, devised by John Reynolds in 1972, that removes first-class functions by replacing function values with data constructors and an apply function.
Defunctland
Defunctland is a YouTube documentary series created by pseudonymous filmmaker Kevin Perjurer about defunct theme parks, attractions, and themed entertainment, with the DefunctTV spin-off, a podcast, VR project, and Peabody Interactive nomination (2023).
Defund the police
Defund the police is a US political slogan from the 2020 George Floyd protests, rooted in prison abolitionism, demanding police budget cuts and reallocation to social services; many cities reversed the cuts and the phrase became a partisan campaign issue.
DEFUSE 3 trial
DEFUSE 3 (Endovascular Therapy Following Imaging Evaluation for Ischemic Stroke 3), NINDS-funded StrokeNet randomized trial of thrombectomy 6-16 hours after stroke onset with perfusion-mismatch selection; 182 patients, functional independence 45% vs 17%, extended thrombectomy window to 24 hours with DAWN.
Defuzzification
Defuzzification is the final step of a fuzzy inference system, converting a fuzzy output set into one crisp number that an actuator or decision procedure can use.
Defy Media
Defy Media, LLC was an American digital media company formed in 2013 by the merger of Alloy Digital and Break Media, owning brands including Smosh and Screen Junkies.
DEFY Wrestling
DEFY Wrestling, Seattle-based independent pro wrestling promotion founded 2017 by Matt Farmer and Jim Perry; home venue Historic Washington Hall; merged with PROGRESS Wrestling 2024; titles include DEFY World and Womens Championships.
Defying Destiny (TV series)
Defying Destiny (María la caprichosa) is a 2026 Colombian telenovela by Caracol Televisión on Netflix, dramatizing labor leader María Roa Borja; 64 episodes, released January 5, 2026, based on Paula Moreno's book Soñar lo imposible.
Defying Gravity (song)
"Defying Gravity" is the Act I finale song of the musical Wicked (2003), written by Stephen Schwartz for Elphaba and Glinda. Written in 2000 from an old chord riff, famously difficult to sing, and the 2024 film's finale.
Deganawida
Deganawida, also spelled Dekanawida or Deganawidah, is the Great Peacemaker of Haudenosaunee oral tradition who united the five Iroquois nations under the Great Law of Peace.
Degarelix
Degarelix (Firmagon, FE200486) is an injectable GnRH antagonist peptide by Ferring for advanced hormone-dependent prostate cancer; 240 mg then 80 mg monthly, rapid castration without flare, main drawback injection-site reactions.
Degassing (chemistry)
Degassing in chemistry is the removal of dissolved gases, most often oxygen, from a solvent, done by freeze-pump-thaw cycling, sparging, or vacuum to protect sensitive reactions and measurements.
Degaussing
Degaussing is reducing an object's magnetization to a very low level: first used from 1939 to protect ships from German magnetic mines, later to erase magnetic tapes and hard drives and to correct color CRT screens. Named after the gauss unit.
Degenerate art
Degenerate art (Entartete Kunst): Nazi label for modern art and the 1937 Munich mock exhibition of 650 confiscated works, initiated by Goebbels and led by Adolf Ziegler; over 16,000 works were confiscated, sold abroad, or burned, drawing over 3 million visitors.
Degenerate energy levels
Degenerate energy levels, known as quantum degeneracy, occur when two or more quantum states share the same energy; fields split these levels, as in the Zeeman and Stark effects.
Degenerate four-wave mixing
Degenerate four-wave mixing is a third-order nonlinear optical process in which four light waves of the same frequency interact in a material to generate a phase-conjugate wave.
Degenerate matter
Degenerate matter, also called a degenerate Fermi gas, is matter so compressed that degeneracy pressure from the Pauli exclusion principle resists collapse, supporting white dwarfs and neutron stars.
Degenerate perturbation theory
Degenerate perturbation theory extends Rayleigh–Schrödinger perturbation theory to quantum systems where several unperturbed eigenstates share the same energy, central to the Stark and Zeeman effects.
Degenerated workers' state
Degenerated workers' state: Trotskyist term, coined by Leon Trotsky for the USSR under Stalin, for a state with a collectivized planned economy where a bureaucratic clique has replaced working-class democratic control; distinct from deformed workers' states.