All articles starting with D
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Duchy of Samogitia
The Duchy of Samogitia (Žemaičių kunigaikštystė), also the Samogitian Eldership, was a self-governing unit of the Grand Duchy of Lithuania from 1411 until its abolition in 1795.
Duchy of Sandomierz
The Duchy of Sandomierz (Księstwo sandomierskie) was a Polish district duchy created after the 1138 testament of Bolesław III Wrymouth, with its capital at Sandomierz and Henry of Sandomierz as its first ruler.
Duchy of Savoy
The Duchy of Savoy was an Alpine state of the House of Savoy, raised from a county to a duchy in 1416 and ceded to France in 1860.
Duchy of Silesia
The Duchy of Silesia (Księstwo śląskie) was a Piast principality created by Poland's 1138 partition; it fragmented into many duchies and passed to the Bohemian Crown by 1348.
Duchy of Styria
The Duchy of Styria (Herzogtum Steiermark, Slovene Štajerska) was a duchy of the Holy Roman Empire raised in 1180 from the Margraviate of Styria, ruled by the Habsburgs from 1282 until its dissolution in 1918.
Duchy of the Archipelago
Duchy of the Archipelago (Duchy of Naxos, Duchy of the Aegean Sea): Latin crusader duchy in the Cyclades founded around 1207 by Marco Sanudo with capital at Naxos; ruled by Sanudo then Crispo dukes, tributary to the Ottomans from 1537, ended 1579 under Joseph Nasi.
Duchy of Troppau
The Duchy of Troppau (Opavské vévodství) was a duchy on the Moravian-Silesian border, created by Ottokar II of Bohemia around 1269 and lasting until 1918.
Duchy of Warsaw
Duchy of Warsaw (Księstwo Warszawskie), Napoleonic Polish client state 1807–1815 under Frederick August I of Saxony; constitution of 22 July 1807, serfdom abolished 1807, enlarged 1809 with Galicia, ended at Congress of Vienna.
Ducie Island
Ducie Island is an uninhabited atoll of the Pitcairn Islands, the most easterly island on the Pacific Plate, hosting over 90% of the world's Murphy's Petrels.
Duck
Duck: waterbird of family Anatidae (Anseriformes), including mallard, pintail, and Muscovy; mallard is ancestor of nearly all domestic ducks; 34 million breeding ducks in 2025 US survey.
Duck Amuck
Duck Amuck (1953) is a Warner Bros. Merrie Melodies short directed by Chuck Jones, written by Michael Maltese, voiced by Mel Blanc, in which an unseen animator (revealed as Bugs Bunny) torments Daffy Duck; National Film Registry 1999, ranked #2 greatest cartoon.
Duck and cover
Duck and cover was a US civil-defense drill taught to the public during the Cold War. It instructed people to drop and take cover during a nuclear flash.
Duck and Cover (film)
Duck and Cover is a 1951 nine-minute U.S. civil defense film by Archer Productions for the FCDA, starring Bert the Turtle, shown to millions of schoolchildren, withdrawn by 1957, and added to the National Film Registry in 2004.
Duck Commander
Duck Commander is a family-owned duck-call maker founded by Phil Robertson in West Monroe, Louisiana, in 1972, best known for the reality series Duck Dynasty.
Duck confit
Duck confit (confit de canard) is a Gascony, South-West France dish of salt-cured duck legs slow-cooked and stored submerged in duck fat, then crisped; a preservation method now central to cassoulet and French bistro cooking.
Duck Creek Technologies
Duck Creek Technologies is an American software company, founded in 2000 and based in Boston, that provides cloud-based core systems for the property and casualty insurance industry.
Duck curve
The duck curve is the graph of a power grid's daily net load after solar generation is subtracted, sagging at midday and climbing steeply in the evening.
Duck Detective: The Secret Salami
Duck Detective: The Secret Salami is a 2024 comedic detective adventure by Happy Broccoli Games starring duck PI Eugene McQuacklin, released May 23, 2024 on PC, Switch, and Xbox, later PS5 and mobile, with a 2025 sequel The Ghost of Glamping.
Duck Dodgers (TV series)
Duck Dodgers (2003–2005) is a Warner Bros. Animation space-opera comedy on Cartoon Network starring Daffy Duck as the incompetent space hero, with Porky Pig, Marvin the Martian, a Flaming Lips theme sung by Tom Jones, 39 episodes in three seasons, and a 2004 Daytime Emmy for Joe Alaskey.
Duck Dodgers in the 24½th Century
Duck Dodgers in the 24½th Century (1953) is a Chuck Jones Warner Bros. Merrie Melodies short starring Daffy Duck, Porky Pig, and Marvin the Martian, parodying Buck Rogers; sequel to a 1980 TV special and 2003 Cartoon Network series.
Duck Dynasty
Duck Dynasty, A&E reality series (2012-2017) about the Robertson family and their Duck Commander duck call business in West Monroe, Louisiana; peaked at 11.8 million viewers, revived in 2025 as Duck Dynasty: The Revival.
Duck Dynasty: The Revival
Duck Dynasty: The Revival is an American reality television series on A&E that revives Duck Dynasty, following Willie and Korie Robertson at their Louisiana homestead; it premiered in 2025.
Duck family (Disney)
The Duck family is a fictional family of Disney cartoon ducks related to Donald Duck, centered in comics, with Huey, Dewey, and Louie and Scrooge McDuck.
Duck Hunt
Duck Hunt (NES, 1984 Japan, 1985 NA launch) is Nintendo R&D1's light gun shooter for the NES Zapper, with Game A/B duck modes and Game C clay shooting; it works only on CRT televisions and was re-released on Wii U Virtual Console in 2014.
Duck River (Tennessee)
The Duck River (Tennessee) is a 284-mile river, the longest entirely within Tennessee, flowing from the Highland Rim to the Tennessee River; one of North America's most biodiverse rivers and drinking water source for over 250,000 people.
Duck Soup (1933 film)
Duck Soup (1933 film): Marx Brothers Paramount comedy directed by Leo McCarey; Groucho's Rufus T. Firefly leads Freedonia into war with Sylvania; final Zeppo appearance, 1990 National Film Registry.
Duck test
The duck test is an abductive heuristic that identifies something from converging familiar signs: if it looks, swims, and quacks like a duck, it probably is one.
Duck tour
Duck tour: sightseeing ride on an amphibious vehicle, usually a WWII DUKW "duck," traveling on land and water. Started 1946 in Wisconsin Dells; known for trademark disputes and fatal accidents prompting 2023 US Coast Guard canopy and bilge rules.
Duck typing
Duck typing is a programming style, common in dynamic languages like Python and Ruby, that judges an object by the methods it has rather than its declared type.
Duck virus enteritis
Duck virus enteritis (duck plague), caused by Anatid herpesvirus 1 (Mardivirus anatidalpha1), an acute hemorrhagic enteritis disease of ducks, geese, and swans; first described 1923 in the Netherlands, no treatment, controlled by biosecurity and attenuated vaccines.