All articles starting with E
17,681 articles
Eustriacum
Eustriacum: ancient place name of Roman Gaul, tentatively identified with Astaillac in Corrèze, France; Barrington Atlas map 14 G4, also attested in the Vigeois cartulary.
Eustrongylidosis
Eustrongylidosis, also called eustrongylidiasis, is a parasitic disease caused by Eustrongylides tubifex, E. ignotus, and E. excisus nematodes, cycling between fish-eating birds, oligochaetes, and freshwater fish, and infecting humans who eat raw fish.
EUT20 Belgium
EUT20 Belgium is a professional T20 franchise cricket league run by Destino Legends Sports LLC with Cricket Belgium. Its inaugural 2026 season (June 6–14, Zemst) featured five city franchises; Ghent Gladiators won the first title.
Eutardigrade
Eutardigrada (eutardigrades) is the larger class of tardigrades, sister to Heterotardigrada, defined by buccopharyngeal appendage morphology, with orders Apochela and Parachela, about 805 non-marine species, and anhydrobiotic cryptobiosis in terrestrial forms.
Eutectic high-entropy alloy
A eutectic high-entropy alloy (EHEA) is a multi-principal-element alloy designed to solidify by a eutectic reaction, combining the castability of eutectic alloys with the complexity of high-entropy alloys.
Eutectic high-entropy alloys via additive manufacturing
Eutectic high-entropy alloys via additive manufacturing are multi-component alloys that combine eutectic dual-phase solidification with high-entropy composition, built layer by layer using laser or arc heat sources.
Eutectic system
An eutectic system, or eutectic mixture, is a mixture of components that melts at a single temperature lower than any component alone, the basis of solders and cast irons.
Euteliidae
Euteliidae, the euteliid moths, is a small family of moths, about 520 species, recognized at family rank in 2011, whose adults resemble dried leaves at rest.
Eutelsat
Eutelsat, also known as Eutelsat Communications, is a French satellite operator headquartered in Paris with 31 geostationary satellites and more than 650 OneWeb low-orbit satellites.
Euterpe edulis
Euterpe edulis (palmito-juçara, juçara) is a solitary Atlantic Forest palm, Vulnerable (VU) from lethal palm heart extraction; its açaí-like fruit is now harvested as a sustainable alternative.
Euterpe family
The Euterpe family is a collisional asteroid family in the inner main belt surrounding the S-type asteroid 27 Euterpe, with the lowest inclinations of any inner-belt family.
Euthanasia
Euthanasia, also called mercy killing or assisted dying, is the deliberate ending of a patient's life at voluntary request. Covers definitions, history from 1870, WMA opposition, and laws in the Netherlands, Canada, Oregon, and France.
Euthanasia Coaster
Euthanasia Coaster (Eutanazijos kalneliai), 2010 conceptual artwork by Julijonas Urbonas: a hypothetical steel roller coaster euthanasia machine, 510 m ascent, seven loops at 10 g for 60 seconds, killing 24 riders via cerebral hypoxia; never built.
Euthanasia for mental illness
Psychiatric euthanasia (EAS, MAID): physician-assisted death based on mental disorder, legal in the Netherlands, Belgium, Luxembourg, Switzerland, Spain, Austria; Canada indefinitely bars it; Dutch cases 1.3% of euthanasia, mostly women with depression.
Euthanasia in Canada
Euthanasia in Canada, legally termed medical assistance in dying (MAID), was legalized by Bill C-14 in 2016 and expanded by Bill C-7 in 2021; mental illness as a sole condition remains excluded, and MAID reached 5.1% of deaths in 2024.
Euthanasia in India
Euthanasia in India: passive euthanasia legal via Supreme Court rulings (Shanbaug 2011, Common Cause 2018, simplified 2023); active euthanasia and physician-assisted suicide remain illegal; Harish Rana first court-approved withdrawal.
Euthanasia in Switzerland
Euthanasia in Switzerland: assisted suicide lawful under Penal Code Article 115 absent selfish motives since 1942, euthanasia illegal, no terminal illness required, SAMS guidelines and EXIT/Dignitas organizations oversee practice.
Euthanasia in the United States
Euthanasia in the United States, also called mercy killing, is illegal in all 50 states; the distinct practice of medical aid in dying (physician-assisted suicide, death with dignity) is legal in 13 states plus D.C., with Montana protected by Baxter v. Montana (2009), under six-month terminal prognosis and self-administration rules.
Eutheria
Eutheria (placentals, eutherian mammals) is the mammalian infraclass named by Huxley in 1880, comprising Placentalia plus extinct stem relatives; sister to Metatheria in Theria, split by 160 Ma, over 90 percent of living mammals.
Euthymios I
Euthymios I (Εὐθύμιος), born around 834 and venerated as a saint from 991, was Ecumenical Patriarch of Constantinople from 907 to 912, a central figure in the Tetragamy controversy over Leo VI's fourth marriage.
Euthymios II
Euthymios II (Greek Ευθύμιος Β΄; died 1416) was Ecumenical Patriarch of Constantinople from 1410 to 1416, between Matthew I and Joseph II, in the late Byzantine period under Ottoman pressure.
Euthymius of Tarnovo
Euthymius of Tarnovo (Евтимий Търновски) was Patriarch of Bulgaria at Tarnovo from 1375 and led a major reform of Church Slavonic spelling and liturgical books.
Euthymius the Great
Euthymius the Great (377–473) was an Armenian-born priest and ascetic, a major figure of Palestinian monasticism whose Khan el-Ahmar monastery is the parent house of all Palestinian monasteries.
Euthyneura
Euthyneura, infraclass of Heterobranchia gastropods (Spengel 1881), traditionally Opisthobranchia plus Pulmonata; molecular phylogenetics redefined it into Acteonacea, Nudipleura, and Tectipleura, with euthyneury shown convergent.
Euthynnus affinis
Euthynnus affinis, kawakawa or eastern little tuna (Cantor, 1849), an Indo-West Pacific neritic tuna of Scombridae; 18-29 degrees C, max ~100 cm, ~150,000 t/yr Indian Ocean catch, synonym Euthynnus yaito.
Euthyphro (Εὐθύφρων)
Euthyphro (Εὐθύφρων) is a Socratic dialogue by Plato in which Socrates asks the religious authority Euthyphro what piety is, posing the Euthyphro dilemma and ending without a definition.
Euthyphro dilemma
The Euthyphro dilemma, from Plato's dialogue, asks whether the good is good because God commands it or whether God commands it because it is good. Both horns challenge divine command theory; theistic replies ground goodness in God's nature.
Euthyroid Graves orbitopathy
Euthyroid Graves orbitopathy is thyroid eye disease, an autoimmune orbital inflammation, occurring without any current or past thyroid dysfunction; it is rare, about 10% of Graves' orbitopathy.
Eutichianus
Eutichianus, also spelled Eutychian, was the 27th pope, a Tuscan who led the Church of Rome from January 275 until his death on 7 December 283.
Eutrephoceras
Eutrephoceras (Hyatt, 1894) is an extinct nautilid cephalopod genus, type species E. dekayi, with a smooth involute shell and near-central siphuncle, ranging Late Jurassic to Miocene and surviving the K/Pg extinction.