All articles A–Z

Diplomatic Revolution

The Diplomatic Revolution (renversement des alliances) of 1756 reversed European alliances: Austria left Britain for France, France dropped Prussia for Austria via the First Treaty of Versailles, and Britain allied with Prussia at Westminster, setting the alignments of the Seven Years' War.

Diplomatic Security Service

The Diplomatic Security Service (DSS) is the law enforcement and security arm of the U.S. State Department's Bureau of Diplomatic Security, created by the 1986 Omnibus Diplomatic Security and Antiterrorism Act, protecting diplomats, missions, and the Secretary of State worldwide.

Diplopia

Diplopia (double vision): perception of two images of one object. Monocular diplopia persists with one eye open (cataract, astigmatism); binocular diplopia resolves when either eye closes and signals ocular misalignment, from decompensated phoria to cranial nerve palsy.

Diploria

Diploria, grooved brain coral (Diploria labyrinthiformis), a monotypic Caribbean brain-coral genus of massive reef-building stony corals; hemispherical colonies with meandering grooved valleys, spring and autumn spawning lineages, IUCN 2022 Critically Endangered.

Diplostomida

Diplostomida (Olson et al., 2003), one of two main digenean trematode orders, uniting Brachylaimoidea, Diplostomoidea (strigeid flukes with a unique holdfast organ) and Schistosomatoidea blood flukes including Schistosoma, cause of schistosomiasis.

Diplotaxis

Diplotaxis is a genus of 39 Brassicaceae species native from Europe and the Mediterranean to the Himalaya, including wild rocket (D. tenuifolia) and wall rocket (D. erucoides), salad greens rich in glucosinolates and quercetin flavonols.

Dipluridae

Dipluridae, curtain-web spiders, is a mygalomorph spider family with 8 genera and 159 species after the 2020 Opatova reclassification; known for funnel-and-sheet curtain webs, very long posterior spinnerets, and former paraphyletic circumscription.

Dipo Ola

Dipo Ola (born 1994, Ibadan, Nigeria) is a British actor, writer, and director trained at the Oxford School of Drama, known for DI Russell Carter in Ludwig, Baba in We Hunt Together, and Douglas Hylton in Landscapers.

Dipodidae

Dipodidae, the birch mice, jumping mice, and jerboas (Dipodoidea), is a rodent family of about 51 species in 15 genera, defined by a hystricomorphous skull with sciurognathous jaw and ranging from quadrupedal forest mice to obligate bipedal desert-hopping jerboas.

Dipolar Bose–Einstein condensate

A dipolar Bose–Einstein condensate is a Bose–Einstein condensate in which long-range, anisotropic dipole–dipole interactions dominate, producing quantum droplets and supersolids; the first was made with chromium atoms in 2005.

Dipolar Bose–Einstein condensate of dysprosium

A dipolar Bose–Einstein condensate of dysprosium is an ultracold gas of dysprosium atoms sharing one quantum wavefunction, first created in 2011, in which magnetic interactions between atoms dominate.

Dipolar quantum droplets

Dipolar quantum droplets are self-bound, liquid-like clusters of ultracold atoms in which quantum fluctuations arrest collapse, first observed in magnetic dysprosium atoms at Stuttgart in 2016.

Dipolar quantum gas

A dipolar quantum gas is an ultracold atomic gas, typically a Bose–Einstein condensate, whose atoms interact through long-range magnetic dipole forces, producing quantum droplets and supersolids.

Dipolar quantum gas of dysprosium

A dipolar quantum gas of dysprosium is an ultracold gas of dysprosium, the most magnetic element, first Bose-condensed in 2011 and since used to create quantum droplets, supersolids, and vortices.

Dipolar supersolid

A dipolar supersolid is a state of ultracold quantum matter, proposed by Eugene Gross around 1960, in which superfluid flow coexists with a crystal-like density modulation, first observed in 2019.

Dipolar-octupolar pyrochlore

A dipolar-octupolar pyrochlore is a cubic magnetic pyrochlore oxide, of formula R2M2O7, whose rare-earth ions carry a Kramers doublet with two dipolar and one octupolar pseudospin component.

Dipole

A dipole is a pair of equal and opposite electric charges, +q and −q, separated by a fixed distance, with a dipole moment directed from the negative to the positive charge.

Dipole and sextupole magnets in accelerators

Dipole and sextupole magnets are members of the multipole family used in every synchrotron: dipoles with two poles bend the beam, and sextupoles with six poles correct chromaticity.

Dipole antenna

A dipole antenna, also known as a Hertz antenna, is a wire antenna of two conductive elements fed at the center, first built by Heinrich Hertz in 1886.

Oct 15, 2026

Dipole radiation

Dipole radiation is the electromagnetic radiation emitted by an oscillating electric or magnetic dipole, the simplest radiating source, with no emission along the dipole axis.

Diponegoro

Pangeran Diponegoro (1785-1855), Yogyakarta prince and pan-Islamist, led the Java War (1825-1830) against the Dutch, was arrested at Magelang in 1830, died in exile in Makassar, and became Indonesia's first national hero.

Dipper Pines

Dipper Pines (Mason "Dipper" Pines) is the boy protagonist of Disney's animated Gravity Falls, twin of Mabel, voiced by Jason Ritter, who solves the Oregon town's paranormal mysteries using Journal 3.

Dippin' Dots

Dippin' Dots: beaded ice cream, yogurt, sherbet, and flavored ice invented by microbiologist Curt Jones in 1988, flash-frozen in liquid nitrogen at about -320 °F and stored near -40 °F, sold at theme parks and stadiums.

Dipping tobacco

Dipping tobacco (dip, moist snuff) is smokeless tobacco placed between lip and gums. Contains 4.4-25.0 mg nicotine per gram; causes mouth, esophageal, and pancreatic cancer; used by 2.1% of US adults.

Diprionidae

Diprionidae, the conifer sawflies (also Combhorn Sawflies), is a family of sawflies whose larvae feed on the needles and cones of conifers, sometimes defoliating pine stands in outbreaks.

Dipriz Animal Park

Dipriz Animal Park (Парк животных «Диприз», Парк жывёл «Дыпрыз») is a private 344-hectare zoo-landscape park near Baranovichi, Belarus, founded in 2011 by furniture firm Dipriz LLC, officially opened 2020, with about 100 species and two pedestrian zones.

Oct 15, 2026

Dipropylene glycol

Dipropylene glycol, also called oxydipropanol, is a liquid glycol mixture produced as a byproduct of propylene glycol manufacture, used chiefly as a low-odor solvent for fragrances and cosmetics.

Diprosopus (διπρόσωπος)

Diprosopus (διπρόσωπος), or craniofacial duplication, is a rare congenital malformation, a subtype of conjoined twins, with partial or complete duplication of facial structures on one head; CNS anomalies in 96% of cases, incidence about 1 in 180,000 to 15 million births.

Diprotodon

Diprotodon, scientifically Diprotodon optatum, was a giant wombat-like marsupial, the largest known, weighing up to 2,700 kg and surviving in Australia until roughly 25,000 years ago.