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Diella (AI system)
Diella, also known as Diella AI, is an Albanian government AI system on the e-Albania portal, appointed "Minister of State for Artificial Intelligence" in September 2025 to fight corruption.
Diels–Alder reaction
The Diels–Alder reaction, also called diene synthesis, is a concerted organic reaction combining a conjugated diene with a dienophile to form a cyclohexene ring, reported by Otto Diels and Kurt Alder in 1928.
Diels–Alder with inverse electron demand
The inverse electron demand Diels–Alder (IEDDA) is a fast [4+2] cycloaddition in which an electron-poor diene, usually a tetrazine, reacts with a strained alkene, releasing nitrogen gas.
Diem (digital currency)
Diem, announced in 2019 as Libra, was a Facebook-backed stablecoin payment system that was renamed in 2020 and never launched, its assets sold to Silvergate Capital in 2022.
Diem Brown
Diem Brown (1980–2014), American reality TV personality and entertainment reporter; competed in eight seasons of MTV's The Challenge, publicly battled ovarian cancer, and founded the patient support site MedGift.
Điện Bàn
Điện Bàn (Điện Bàn): historic district, prefecture, and 2015-2025 district-level town of Quảng Nam, Vietnam, now wards of Đà Nẵng after the 2025 provincial merger; home to Điện Nam - Điện Ngọc Industrial Park and the 400-year Phước Kiều bronze casting village.
Dien Hong Council
The Dien Hong Council (Hội nghị Diên Hồng) was a 1284 assembly of village elders in Thang Long that unanimously advised war against the Mongol-Yuan invasion.
Diencephalic syndrome
Diencephalic syndrome (Russell syndrome, diencephalic cachexia): rare infantile disorder from hypothalamic or optic chiasm low-grade glioma causing severe emaciation with preserved linear growth, hyperactivity, and euphoria; under 200 reported cases.
Diencephalic-mesencephalic junction dysplasia
Diencephalic-mesencephalic junction dysplasia (DMJD, ORPHA:319192) is a rare autosomal recessive brain malformation with a butterfly-shaped midbrain on MRI, caused by PCDH12 or GSX2 variants.
Dienestrol
Dienestrol (dienoestrol, Estraguard, Ortho Dienestrol), synthetic non-steroidal stilbestrol estrogen, C18H18O2, CAS 84-17-3, prepared by Dodds in 1938; used as 0.01% vaginal cream for atrophic vaginitis; FDA-approved 1947, later discontinued.
Dieng Volcanic Complex
Dieng Volcanic Complex (Kompleks Vulkanik Dieng): a late Quaternary complex volcano and highland plateau in Central Java, Indonesia, with active phreatic craters, a deadly 1979 CO2 eruption, geothermal fields, and ancient Hindu temples.
Dienochlor
Dienochlor is an organochlorine insecticide and acaricide, first reported in 1964, that controlled plant-damaging mites on ornamentals in greenhouses and outdoors; it is now obsolete.
Dienogest
Dienogest (Visanne) is a fourth-generation progestin, 2 mg daily oral therapy for endometriosis pain, first approved in Japan in 2008; also used with estradiol in contraceptives like Natazia, with irregular bleeding as its main side effect.
DIEP flap
The DIEP flap, or deep inferior epigastric perforator flap, is a microsurgical breast reconstruction technique that transfers lower abdominal skin and fat while sparing the rectus muscle.
Dieppe Raid
Operation Jubilee, the Dieppe Raid of 19 August 1942: a failed Anglo-Canadian amphibious raid on occupied Dieppe, France, mainly by the 2nd Canadian Infantry Division, costing over 4,000 Canadian casualties and shaping later D-Day planning.
Dieric Bouts
Dieric Bouts (c. 1410/1420–1475) was an early Netherlandish painter of Leuven, known for the Altarpiece of the Last Supper and the Justice of Emperor Otto III panels.
Dierk Raabe
Dierk Raabe is a German metallurgist, director of the Max Planck Institute for Sustainable Materials in Düsseldorf since 1999, known for crystal plasticity simulation and green steel.
Dierks Bentley
Dierks Bentley (born 1975, Phoenix) is an American country singer-songwriter known for blending country with bluegrass. Debut single "What Was I Thinkin'" (2003) hit No. 1; 22 No. 1 singles, Grand Ole Opry member since 2005, albums through Broken Branches (2025).
Diersheim
Diersheim (Rheinau-Diersheim, Ortenaukreis, Germany), village on the right bank of the Rhine about 20 km northeast of Strasbourg, site of two 1st-century AD cremation cemeteries of the Suebi 'Oberrheingermanen', excavated in the 1930s (Oberfeld) and 2015-2020 (Diersheim II).
Dies irae
Dies irae (Dies iræ), Latin for "Day of Wrath," is a medieval Latin sequence sung in the Catholic Requiem Mass, traditionally attributed to Thomas of Celano.
Diés Iraé
Diés Iraé (ഡീയസ് ഈറേ), Latin for Day of Wrath, is a 2025 Malayalam horror thriller written and directed by Rahul Sadasivan, starring Pranav Mohanlal as Rohan, haunted after a classmate's suicide; released 31 October 2025, biggest A-rated Malayalam opener.
Dies Janse
Dies Janse (born 2006, Goes) is a Dutch left-footed centre-back, 1.96 m, for Ajax; debuted 11 August 2024 vs sc Heerenveen, loaned to FC Groningen 2025/26, contract extended to June 2030.
Diesel (2025 film)
Diesel (டீசல்) is a 2025 Tamil action thriller directed by Shanmugam Muthusamy, starring Harish Kalyan as a North Chennai diesel smuggler opposite Vinay Rai; released October 17, 2025, streaming on Aha Tamil and Sun NXT from November 21, 2025.
Diesel (fashion house)
Diesel is an Italian fashion brand, led by denim and positioned in premium casual wear, founded in 1978 in Molvena and controlled by Renzo Rosso's OTB Group.
Diesel Brothers
Diesel Brothers is a Discovery Channel reality series (2016–2022) starring David 'Heavy D' Sparks and 'Diesel Dave' Kiley, Utah truck builders known for custom diesel builds, giveaways, and a Clean Air Act emissions-tampering lawsuit.
Diesel cycle
The Diesel cycle is the idealized thermodynamic model for compression-ignition engines, proposed by Rudolf Diesel in 1892, adding heat at constant pressure rather than constant volume.
Diesel Electric railmotor (VR)
The Diesel Electric railmotor was a class of ten railmotors operated by the Victorian Railways in Australia, built at Newport Workshops between 1928 and 1931.
Diesel engine
The diesel engine, or compression-ignition engine, is an internal combustion engine that ignites fuel by compression alone; Rudolf Diesel completed the first working one in 1897.
Diesel engine runaway
Diesel engine runaway, also called diesel runaway, is a condition where a diesel engine runs out of control on unintended fuel such as its own oil.
Diesel exhaust fluid
Diesel exhaust fluid (DEF), sold as AdBlue, is a 32.5 percent urea solution injected into diesel exhaust, where it reduces nitrogen oxide emissions in SCR systems.