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Dimethylaniline
Dimethylaniline, most commonly N,N-dimethylaniline, is a toxic tertiary aromatic amine, a yellow to brown oily liquid used mainly as an intermediate in dye and vanillin manufacture.
Dimethylarginine
Dimethylarginine refers to two isomers, ADMA and SDMA, non-proteinogenic amino acids formed from methylated arginine in proteins; ADMA inhibits nitric oxide synthase and both are cardiovascular risk markers.
Dimethylethanolamine
Dimethylethanolamine (DMEA), also called dimethylaminoethanol or Deanol, is a flammable organic compound made from dimethylamine and ethylene oxide, used mainly as a polyurethane foam catalyst and neutralizing amine for water-based coatings.
Dimethylformamide
Dimethylformamide (DMF), also known as N,N-dimethylmethanamide, is a colorless, water-miscible organic amide with formula HCON(CH3)2, used at large industrial scale as a polar aprotic solvent.
Dimethylglycine dehydrogenase deficiency
Dimethylglycine dehydrogenase deficiency (DMGDH deficiency) is an extremely rare autosomal recessive glycine metabolism disorder, known from a single case with fish-like odor, muscle fatigue, elevated creatine kinase, and 100-fold raised serum dimethylglycine due to the homozygous H109R DMGDH variant.
Dimethylglyoxime
Dimethylglyoxime (dmgH2), also called diacetyl dioxime, is a white crystalline dioxime widely used in analytical chemistry as a chelating reagent that forms an insoluble scarlet precipitate with nickel.
Dimethylmercury
Dimethylmercury is a colorless, volatile organomercury compound and potent neurotoxin that permeates laboratory gloves almost instantly, historically used as an NMR reference standard and linked to several lab fatalities.
Dimethylsulfoniopropionate
Dimethylsulfoniopropionate (DMSP) is an abundant marine organosulfur osmolyte made by phytoplankton, algae, bacteria, corals, and some plants via methylation, transamination, or decarboxylation pathways, and degraded to DMS, methanethiol, or DMSOP.
Dimethyltryptamine
N,N-Dimethyltryptamine (DMT) is an indole alkaloid psychedelic, the active compound in ayahuasca, an endogenous sigma-1 receptor agonist, rapidly metabolized by MAO-A with a 9–12 minute intravenous half-life.
Dimethylurea
Dimethylurea, formally 1,3-dimethylurea, is a symmetrical urea derivative with one methyl group on each of urea's two nitrogen atoms, giving formula C₃H₈N₂O. It is a colorless crystalline solid used to synthesize caffeine and in textile finishing.
Dimethylvinphos
Dimethylvinphos (甲基毒虫畏), also called chlorfenvinphos-methyl, is an organophosphate rice insecticide introduced in 1966, an acetylcholinesterase inhibitor (IRAC 1B) with rat oral LD50 97.5 mg/kg, not approved in the EU and considered obsolete.
Dimetrodon
Dimetrodon, an early Permian sail-backed synapsid (pelycosaur, sphenacodontid) from Texas and Germany, is a mammal relative, not a dinosaur; it went extinct about 60 million years before dinosaurs and likely used its sail for thermoregulation.
Dimexano
Dimexano, also known as dixanthogen or dimexan, is an obsolete xanthogen disulfide herbicide, desiccant, and plant growth regulator formerly used on vegetables, not approved in the EU.
Dimi Mavropoulos
Dimi (Dimis) Mavropoulos, Ντίμης Μαυρόπουλος, 1949–2026, Cypriot rally driver from Limassol; Cyprus champion 1986, 1988, 1990; won all seven 1990 events; founded Cyprus Historic & Classic Motor Museum; died off Cape Greco.
Dimi Mint Abba
Dimi Mint Abba (born Loula Bint Siddaty Ould Abba, 1958–2011) was a Mauritanian griot singer and ardin player known as the "diva of the desert".
Diminazene
Diminazene, sold under the brand name Berenil, is an aromatic diamidine veterinary antiprotozoal drug introduced in 1955, and the most commonly used trypanocide in cattle, sheep, and goats.
Dimini
Dimini (Διμήνι), near Volos, Thessaly: a Neolithic hill settlement with six concentric stone enclosures and a Mycenaean town on the plain below, identified by its excavator with ancient Iolkos and featuring Megaron A and B, Linear B, and tholos tombs.
Diminished ovarian reserve
Diminished ovarian reserve (DOR): reduced oocyte quantity with regular menses, assessed by AMH and antral follicle count; predicts IVF oocyte yield but not independent fertility, and oocyte quality is similar to age-matched women.
Diminished seventh chord
Diminished seventh chord (°7): four-note chord of stacked minor thirds dividing the octave equally; symmetrical, enharmonically reinterpretable, resolves to the tonic as a leading-tone dominant, and famous in opera for dramatic shock.
Diminished triad
A diminished triad is a three-note chord of two stacked minor thirds: root, minor third, and diminished fifth (tritone), written with a degree sign (vii°). Diatonic on degree 7 of major and degree 2 of natural minor; base of half-diminished and diminished seventh chords.
Diminishing marginal utility
Diminishing marginal utility is the economic principle that each additional unit of a good adds less satisfaction than the one before, foundational to consumer theory since the 1870s.
Diminishing returns
Diminishing returns, known as the law of diminishing returns, is the economic principle that adding more of one input to fixed inputs yields smaller output gains.
Diminutive
Diminutive: a word-formation device, usually an affix, marking smallness plus affective senses (affection, irony, intensification). Studied cross-linguistically via Jurafsky's radial category, verbal diminutives in 248 languages, and child-directed speech.
Dimitar Berbatov (Димитър Иванов Бербатов)
Dimitar Berbatov (Димитър Иванов Бербатов), Bulgarian striker from Blagoevgrad; played for CSKA Sofia, Bayer Leverkusen, Tottenham, Manchester United, Fulham, PAOK; five goals in one Premier League match, Bulgaria's all-time top scorer.
Dimitar Dobrev
Dimitar Dobrev (Димитър Добрев, 1931–2019), Bulgarian Greco-Roman wrestler, middleweight Olympic gold at Rome 1960 and silver at Melbourne 1956; later national coach who discovered Boyan Radev and Petar Kirov.
Dimitar Grekov
Dimitar Grekov (Димитър Греков) was a Bulgarian jurist and politician who served as Prime Minister of Bulgaria from January to October 1899 and earlier as justice and foreign minister.
Dimitar Miladinov
Dimitar Miladinov (Димитър Миладинов, 1810–1862) was a Bulgarian National Revival educator and folklorist from Struga who collected folk songs published by his brother Konstantin in 1861.
Dimitar Obshti
Dimitar Obshti (Димитър Общи; born Dimitar Nikolov, 1835–1873) was a Bulgarian revolutionary who served as Vasil Levski's assistant and organized the 1872 Arabakonak postal robbery; his testimony led to Levski's capture and hanging.
Dimitar P. Filev
Dimitar P. Filev is an engineer who spent 28 years at Ford Motor Company as Senior Henry Ford Technical Fellow and was elected to the National Academy of Engineering in 2018.
Dimitar Rizov
Dimitar Rizov (Димитър Ризов; 1862–1918) was a Bulgarian revolutionary, journalist, and diplomat from Bitola who helped found the Balkan League and died in Berlin while serving as minister plenipotentiary.