edgepedia

All articles A–Z

519,064 articles

Dirtyphonics

Dirtyphonics is a French electronic music duo from Paris, formed in 2004, consisting of Charly Barranger and Julien "PitchIn" Corrales, called the biggest drum and bass act to come out of France.

Dirucotide

Dirucotide (MBP8298), a 17-amino-acid myelin basic protein peptide, was an intravenous antigen-specific tolerance therapy for HLA-DR2/DR4 secondary progressive MS, discontinued in 2009 after the Phase III MAESTRO-01 trial missed its EDSS progression endpoint.

Dis mon

Dis Mon (Disease-a-month : DM), a monthly US medical review journal begun 1954, published by Elsevier (formerly Year Book Publishers, Mosby); each issue reviews one clinical topic for primary care physicians; MEDLINE-indexed since 1965.

Dis Mons

Dis Mons, Io's "Steeple Mountain," is a 150 km mountain at 70.89°N, 318.02°W on Jupiter's moon Io, named after Dante's Dis and approved by the IAU on January 29, 2025.

Disa

Disa Records is a Monterrey-based Mexican record label founded by the Chávez family, known for grupero and duranguense music and sold to Univision in 2001.

Disability

Disability: umbrella term for impairments, activity limitations, and participation restrictions; affects about 1.3 billion people (16% of humanity). Defined via medical, social, and biopsychosocial models, the WHO ICF, and the CRPD.

Disability classification in judo

Disability classification in judo (Para judo): IBSA assigns visually impaired judoka to J1 (LogMAR 2.6 or worse) or J2 (LogMAR 1.3-2.5 or visual field 60 degrees or less) classes, introduced in 2022, replacing B1-B3, with competition by weight category.

Disability Evaluation

Disability evaluation: formal assessment of whether impairment prevents substantial gainful work. Covers SSA's disability freeze (1954), Bluebook listings, five-step sequential evaluation, state DDS determinations, and inter-rater reliability evidence.

Disability Insurance

Disability insurance is insurance that replaces part of a person's income when injury or illness prevents work, through private policies or programs like Social Security Disability Insurance.

Disability literature

Disability literature is writing in which disability, illness, or impairment is a central subject, together with literary disability studies, the field analyzing how texts represent disabled people.

Disability sport classification

Disability sport classification, or Para sport classification, is the IPC-governed system that determines eligibility and assigns sport classes to athletes with impairments, using four assessment stages under the 2025 Classification Code.

Disability-adjusted life year

Disability-adjusted life year (DALY), the Global Burden of Disease metric: DALY = YLL + YLD, one lost year of healthy life; introduced 1993 World Development Report, simplified after GBD 2010.

Disabled person

Disabled person: someone experiencing disability, defined by the WHO ICF as impairments, activity limitations, and participation restrictions arising from health conditions interacting with environmental and personal factors; about 15% of the world's population, protected by the CRPD.

Disaccharide

A disaccharide is a carbohydrate in which two monosaccharide sugars are joined by a glycosidic bond; the common ones, sharing formula C12H22O11, include sucrose, lactose, and maltose.

Disaggregated memory

Disaggregated memory is a datacenter architecture that decouples main memory from compute nodes into shared, independently scalable pools over an interconnect, raising memory utilization across a datacenter.

Disagreements on the intensity of tornadoes

Disagreements on the intensity of tornadoes, also known as tornado rating controversies, arise because tornado winds are inferred from damage, so different scales like the Fujita and TORRO systems assign different ratings.

Disani Corona

Disani Corona is a 300-km-wide corona, a quasi-circular volcano-tectonic structure, on Venus at 2.70°N, 57.50°E in the Mead quadrangle, named in 2003 for a Nuristani fertility goddess.

Disappearance and killing of Emily Pike

Emily Pike was a 14-year-old San Carlos Apache girl who disappeared from a Mesa, Arizona group home on January 27, 2025; her dismembered remains were found February 14, 2025 near Globe. The homicide remains unsolved.

Disappearance and murder of Gannon Stauch

Gannon Stauch was an 11-year-old Colorado boy reported missing January 27, 2020 and found dead in Florida; stepmother Letecia Stauch was convicted of his murder in 2023, but the conviction was reversed in April 2026 over a juror conflict, with a state Supreme Court appeal pending.

Disappearance at Clifton Hill

Disappearance at Clifton Hill (2019) is a Canadian neo-noir thriller by Albert Shin, starring Tuppence Middleton, about a woman investigating a childhood kidnapping memory in Niagara Falls; premiered at TIFF 2019, released February 28, 2020.

Disappearance of Abigail Blagg

Abigail "Abby" Jo Blagg, a 6-year-old from Grand Junction, Colorado, vanished with her mother Jennifer on November 12, 2001. Jennifer's body was found in a landfill; father Michael Blagg was twice convicted of her murder, but Abby has never been found and no one has been charged in her disappearance.

Disappearance of Agatha Christie

Agatha Christie's 1926 disappearance: the crime writer vanished for 11 days from December 3, 1926, sparking a 15,000-volunteer search, and was found in Harrogate as "Teresa Neele"; the cause remains unexplained.

Disappearance of al-Hakim

The disappearance of al-Hakim (غيب الحاكم) was the vanishing of the Fatimid caliph al-Hakim bi-Amr Allah during a night ride outside Cairo in 1021; only his donkey and bloodstained garments were found.

Disappearance of Alex Batty

Alex Batty, an Oldham boy taken abroad in 2017 by his mother Melanie and grandfather David during a Spanish holiday, lived off-grid in a spiritual community for six years before being found near Toulouse, France in December 2023; the criminal investigation was closed in 2025.

Disappearance of Amanda Campbell

The disappearance of Amanda Campbell concerns a four-year-old American girl who vanished while riding her bicycle in Fairfield, California, on December 27, 1991; she has never been located.

Disappearance of Amy Lynn Bradley

Amy Lynn Bradley, born 1974, vanished March 24, 1998 from Royal Caribbean's Rhapsody of the Seas between Aruba and Curaçao. Unsolved FBI case; $100,000 reward; subject of Netflix's Amy Bradley Is Missing.

Disappearance of Andrew Gosden

The disappearance of Andrew Gosden concerns a 14-year-old from Doncaster who vanished in September 2007 after traveling alone by train to London King's Cross, where CCTV last recorded him.

Disappearance of Ann Marie Burr

Disappearance of Ann Marie Burr: eight-year-old Tacoma, Washington girl who vanished from her bedroom on August 31, 1961; never found, case still open, long speculated but unproven as Ted Bundy's first victim.

Disappearance of Asami Chida (千田麻未)

Asami Chida (千田麻未), also called the Muroran girls' high school disappearance case, a 16-year-old Muroran Sakae High School student who vanished March 6, 2001 in Hokkaido after boarding a bus to her bakery job; unsolved, with PHS data showing a 1 km move in four minutes.

Disappearance of Asha Degree

Asha Jaquilla Degree, born 1990, vanished at age 9 from Shelby, North Carolina, on February 14, 2000; last seen walking N.C. Highway 18 at 4 a.m.; her buried book bag was found in Burke County in 2001; investigators in 2024 said they believe she was killed.