All articles starting with D
24,034 articles
Dunne-Musun Corona
Dunne-Musun Corona, a 630-km-diameter corona (volcano-tectonic feature) on Venus at −60°, 85°E, IAU-named in 1997 after an Evenk earth and taiga mistress.
Dunning–Kruger effect
Dunning–Kruger effect: proposed cognitive bias, named after Kruger and Dunning (1999), where low performers overestimate ability; heavily contested as likely a regression-to-the-mean statistical artifact.
Dunnock
Dunnock (Prunella modularis), also called hedge sparrow or hedge accentor, a small Eurasian accentor of hedgerows and gardens, known for its variable polyandrous mating system, cloaca-pecking, blue eggs, and UK Amber-listed 43% population decline.
Dunnottar Castle
Dunnottar Castle, also known as Dunotter Castle, is a ruined cliff-top fortress in Aberdeenshire, Scotland, best known for hiding the Scottish crown jewels in 1651.
Dunnu
A dunnu was a fortified farmstead and estate center of the Middle Assyrian period, attested from the 13th to the 11th centuries BC; the best-known example is Tell Sabi Abyad in northern Syria.
Dunrobin Castle
Dunrobin Castle, near Golspie in Sutherland, Scotland, is the historic seat of the Earls and Dukes of Sutherland, largely rebuilt by Sir Charles Barry in the 1840s.
Duns Scotus
John Duns Scotus, called the Subtle Doctor, was a Scottish Franciscan theologian and philosopher, c. 1263/64 to 1308, ranked with Aquinas and Ockham among medieval philosophy's three principal figures.
Dunsfold Aerodrome
Dunsfold Aerodrome, also known as Dunsfold Park, is a private airfield in Surrey, England, built in 1942 and the Hawker Hunter and Harrier flight test center.
Dunsinane Regio
Dunsinane Regio is a 244-km-wide regio on Miranda, Uranus's innermost large moon, named for Macbeth's defeated castle and approved by the IAU in 1988; known only from Voyager 2's 1986 flyby.
Dunsmuir v New Brunswick
Dunsmuir v New Brunswick, 2008 SCC 9, is a Supreme Court of Canada administrative law case that reduced judicial review to two standards, correctness and reasonableness, defined reasonableness by justification, transparency and intelligibility, and dismissed dismissed civil servant David Dunsmuir's appeal.
Dunstan
Dunstan, also known as Saint Dunstan of Canterbury, was an English monk, craftsman, and archbishop of Canterbury for twenty-eight years, a leading figure of the tenth-century Benedictine reform in England.
Dunsterforce
Dunsterforce, officially the British Military Mission to the Caucasus, was a handpicked British force assembled in January 1918 under Major-General Lionel Dunsterville to secure Baku's oil fields.
Dunston Checks In
Dunston Checks In is a 1996 American family comedy directed by Ken Kwapis and starring Jason Alexander, Faye Dunaway, and Rupert Everett, about an orangutan in a New York hotel.
Duntocher
Duntocher, a village in West Dunbartonshire, Scotland, near Clydebank, is the westernmost visible point of the Antonine Wall, with a Roman fort, fortlet, and bathhouse on Golden Hill, excavated 1948-51 by Anne Robertson.
Dunton Hot Springs
Dunton Hot Springs is an all-inclusive luxury resort in a restored 1885 Colorado ghost town on the West Fork Dolores River, with 42°C calcium bicarbonate springs, 13-14 historic cabins, and no day-use access.
Dunwei Wang
Dunwei Wang is a chemist at Boston College whose research stores solar energy in chemical fuels, chiefly through photoelectrochemical water splitting, and he has led a laboratory there since 2007.
Dünyanın En Güzel Arabistanı
Dünyanın En Güzel Arabistanı is a 1959 poetry collection by the Turkish poet Turgut Uyar, where he abandoned his early socially themed verse and helped pioneer the İkinci Yeni movement.
Duobao Pagoda Stele
The Duobao Pagoda Stele (多宝塔碑) is a stone stele erected in 752 during the Tang dynasty, bearing regular-script calligraphy by the master Yan Zhenqing, preserved in the Xi'an Beilin Museum.
Duobinary modulation
Duobinary modulation, known as optical duobinary in fiber systems, is a correlative coding technique proposed by Adam Lender in 1963 that halves bandwidth and increases chromatic dispersion tolerance.
Duodea
Duodea (Greek Δυοδέα, Δουώδέα) was a Roman mutatio, a horse-change road station on the Via Egnatia about 13-14 Roman miles east of Thessaloniki, Macedonia, near Lake Koroneia, known from the Peutinger Table and Bordeaux Itinerary.
Duodecimal
Duodecimal, also called dozenal or base twelve, is a positional numeral system using twelve digits. Its base twelve divides evenly by 2, 3, 4, and 6, so fractions like 1/3 terminate.
Duodenal atresia
Duodenal atresia is a congenital blockage of the duodenum, occurring in 1 in 5,000 to 10,000 live births, often with Down syndrome, presenting with bilious vomiting and the double-bubble sign, treated surgically.
Duodenal cancer
Duodenal cancer, a non-ampullary small intestinal carcinoma, is a rare adenocarcinoma of the duodenum with rising incidence, poor advanced-stage survival, and dedicated Japanese treatment guidelines from 2021 and 2025.
Duodenal erosion
Duodenal erosion (ICD-11 DA63.0): a shallow mucosal breach of the duodenum not extending through the muscularis mucosae, distinct from ulcer; may precede or accompany duodenal ulcer, diagnosed by endoscopy and biopsy.
Duodenal polyp
Duodenal polyp: mucosal or submucosal growth in the duodenum, found in 0.6–5% of upper endoscopies; adenomas (10–20%) are premalignant and removed endoscopically, with bleeding and perforation risks higher than in the colon.
Duodenal switch
The duodenal switch (BPD-DS) is a bariatric operation combining sleeve gastrectomy with intestinal bypass, giving the greatest weight loss and diabetes remission among standard procedures.
Duodenal ulcer
A duodenal ulcer is a break in the lining of the duodenum, the first part of the small intestine, and a form of peptic ulcer disease.
Duodenal varices
Duodenal varices, also called duodenal varix, are ectopic portosystemic collateral veins in the duodenum from portal hypertension; rare (0.2-0.4% on endoscopy), prone to massive bleeding with up to 40% mortality, treated endoscopically or by TIPS/BRTO.
Duodenectomy
Duodenectomy is the surgical removal of all or part of the duodenum, the first section of the small intestine, performed for tumors, trauma, and duodenal polyposis in familial adenomatous polyposis.
Duodenitis
Duodenitis is inflammation of the duodenum, the first part of the small intestine. Main causes are H. pylori infection, excess stomach acid, and NSAID overuse; treated with antibiotics and acid reducers.