All articles A–Z
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Dionysius of Alexandria
Dionysius of Alexandria (Διονύσιος ὁ Ἀλεξανδρεύς), called Dionysius the Great, was bishop of Alexandria from about 247/248 until his death in 264/265, guiding the church through the Decian and Valerian persecutions.
Dionysius of Halicarnassus
Dionysius of Halicarnassus (Διονύσιος ὁ Ἀλικαρνασσεύς) was a Greek historian and teacher of rhetoric who moved to Rome after 30 BC and wrote the Roman Antiquities, a history of early Rome in 20 books.
Dionysius of Suzdal
Dionysius of Suzdal (died 1385) was a Russian Orthodox saint and archbishop of Suzdal and Nizhny Novgorod who founded the Pechersky monastery near Nizhny Novgorod around 1335.
Dionysius Thrax
Dionysius Thrax, surnamed the Thracian, was a Greek grammarian of Alexandria (c. 170–c. 90 BCE) who wrote the Techne grammatike, the model for European grammar teaching for over a millennium.
Dionysos Bresagenes, T.
Dionysos Bresagenes, T. (Διόνυσος Βρησαγένης): sanctuary of Dionysos under this epithet at Cape Agios Phokas, Lesbos, near Vrisa; small 1st-century BC Doric temple, attributed by Androtion to Makar, occupied from the Early Bronze Age to Byzantine times.
Dionysus (Διόνυσος)
Dionysus (Διόνυσος), Greek god of wine, vegetation, and ecstasy, attested in Linear B from the Mycenaean era; son of Zeus and Semele; his Dionysia festivals at Athens produced Greek drama and the Theatre of Dionysus.
Dionýz Ilkovič
Dionýz Ilkovič was a Slovak physicist who derived the Ilkovič equation of polarography in 1934 and is regarded as the founder of physics in Slovakia.
Dioon
Dioon is a genus of 18 accepted cycad species in Zamiaceae, native from Mexico to Honduras. Originating about 56 Ma in eastern Mexico, it includes the slow-growing, ethnobotanically important chamal (Dioon edule).
Dioon edule
Dioon edule, chestnut dioon or chamal, a slow-growing Mexican cycad (Zamiaceae) from the Sierra Madre Oriental; dioecious, beetle-pollinated, over 2500 years lifespan, IUCN Near Threatened, CITES Appendix II, cold-hardy to about -12 °C.
Dioon holmgrenii
Dioon holmgrenii, Palmera de Sol, an endangered Mexican cycad (Zamiaceae) described in 1981, endemic to Pacific-slope pine-oak forest of Oaxaca at 580–850 m, with six genetically isolated populations.
Diophantine approximation
Diophantine approximation is the branch of number theory studying how closely a real number can be approximated by rationals with bounded denominators; key results include Dirichlet's and Roth's theorems.
Diophantine condition
A Diophantine condition is an arithmetic lower bound keeping frequency vectors from being too closely approximated by rationals, used in KAM theory to control small divisors.
Diophantine equation
A Diophantine equation, or Diophantine analysis, is a polynomial equation with rational coefficients whose integer or rational solutions are sought, as in Fermat's Last Theorem, proved in 1994.
Diophantine geometry
Diophantine geometry studies integral and rational points on systems of polynomial equations through algebraic geometry, named for Diophantus of Alexandria; Serge Lang coined the term in 1962.
Diophantine set
A Diophantine set is a set of tuples of positive integers that forms part of the solution set of a polynomial equation with integer coefficients, central to Hilbert's tenth problem.
Diophantus (Διόφαντος)
Diophantus (Διόφαντος), also known as Diophantus of Alexandria, was a Greek mathematician active about 250 CE, sometimes called the father of algebra, best known for his Arithmetica.
Diopside
Diopside is a calcium magnesium silicate pyroxene, MgCaSi₂O₆, common in olivine-rich basalts and metamorphosed limestones worldwide, cut into vivid green gemstones, and used to study Earth's mantle formation conditions.
DIOPSYS trial
DIOPSYS trial (NCT03642782): a single-arm diagnostic study at Groupe Hospitalier Paris Saint-Joseph, Paris, sponsored by Fondation Hôpital Saint-Joseph, testing the Diopsys NOVA pattern electroretinogram for early glaucoma diagnosis; 12 patients planned, started July 2018, now suspended.
Dioptase
Dioptase is a hydrated copper cyclosilicate mineral with intense emerald-green to blue-green crystals, named by René Just Haüy in 1797 and prized as a collector's specimen.
Dioptre
The dioptre, spelled diopter in American English, is the unit of optical power equal to the reciprocal of focal length in meters, standard in eyeglass and contact lens prescriptions.
Dior
Dior (House of Dior, Christian Dior Couture): French luxury fashion house founded in 1946 at 30 Avenue Montaigne, Paris, by Christian Dior; famous for the 1947 New Look, now under Jonathan Anderson within the LVMH-controlled Christian Dior group.
Dior (大颖) (singer)
Dior 大颖 (陈大颖) is a Malaysian singer-songwriter from Batu Pahat, Johor, known for 《在加纳共和国离婚》 with Firdhaus and her KAMPUNG GIRL 普通人 world tour; distinct from the fashion house Dior.
Dior Saddle bag
The Dior Saddle bag is a curved, saddle-shaped flap bag designed by John Galliano in 1999 for Dior's spring/summer 2000 collection, halted in 2007, and revived by Maria Grazia Chiuri in 2018; distinct from the Lady Dior by its equestrian asymmetry, D stirrup clasp, and Oblique canvas.
Diora Baird
Diora Baird, American actress and former model born 1983 in Miami, known for Wedding Crashers, The Texas Chainsaw Massacre: The Beginning, Playboy August 2005 cover, and Cobra Kai's Shannon.
Diorama
Diorama: a 3D reduced-scale representation of a real-life scene, coined by Daguerre in 1822 as a light-effect Paris theater, later the glass-cased habitat display form of natural history museums.
Diorama (Silverchair album)
Diorama (2002) is the fourth studio album by Australian band Silverchair, produced by David Bottrill with Van Dyke Parks orchestrations. It broke from grunge toward piano-based orchestral art rock, debuted at ARIA No. 1, and touring was curtailed by Daniel Johns's reactive arthritis.
Diorite
Diorite is a coarse-grained intrusive igneous rock of intermediate composition, made mainly of plagioclase feldspar and dark minerals, with a speckled salt-and-pepper appearance; its fine-grained volcanic equivalent is andesite.
Diorsman (屌丝男士)
Diorsman (屌丝男士, Diors Man) is a Sohu Video web sitcom created by and starring Da Peng, running four seasons 2012–2015, adapted from Germany's Knallerfrauen, with about 1.7 billion views and a 2014 censorship takedown.
Dios Bendiga
Dios Bendiga, Spanish for "God Bless," is the eleventh studio album by American hip-hop group Cypress Hill, released on July 24, 2026, and their first entirely in Spanish.
Dioscorea
Dioscorea (yams), genus of c. 630 species of twining climbers in Dioscoreaceae; source of staple tuber crops (D. rotundata, D. alata, D. polystachya) and diosgenin; cosmopolitan, dioecious, x=10 Old World, x=9 New World.