All articles starting with U

Ur-Ninurta

Ur-Ninurta of Isin was the sixth king of the First Dynasty of Isin in southern Mesopotamia, reigning from 1925 to 1898 BC and succeeded by his son Bur-Sin.

Ur-Nungal

Ur-Nungal, variant Ur-lugal, is a legendary king of the First Dynasty of Uruk in the Sumerian King List, named as the son of Gilgamesh and given a 30-year reign.

Ur-Pabilsag

Ur-Pabilsag was an Early Dynastic ruler of the Sumerian city of Ur around 2600–2450 BC, known from a single inscribed vase fragment found in the Royal Cemetery of Ur.

Ur-Utu, born Bēlānum, was chief lamentation priest of the goddess Annunītum at Sippar-Amnānum in the Old Babylonian period; his excavated house at Tell ed-Dēr yielded the largest private Old Babylonian archive, about 2,000 tablets.

Ur-Zababa

Ur-Zababa of Kish was a Sumerian king known from the Sumerian King List and the poem Sargon and Ur-Zababa, which tells how his cupbearer Sargon overthrew him.

Ura (Anatolia)

Ura, also written Urra, was a Bronze Age port town on the Cilician coast of southern Anatolia, serving as the Hittite empire's principal Mediterranean harbor; its exact location remains disputed.

Ura Fons

Ura Fons, the divinized spring Ura (Fontaine d'Eure near Uzès), supplied Roman Nemausus (Nîmes) via the Pont du Gard aqueduct; attested by the cultores Urae fontis altar (CIL XII 3076) and Pompeius Pandus's nymphaeum.

Oct 22, 2026

Urabe clan

The Urabe clan (卜部氏) was a hereditary Japanese clan of diviners who served the imperial court from ancient times, specializing in turtle-shell divination and staffing the Department of Divinities.

Sep 23, 2026

Urabi Revolt

The Urabi Revolt (ثورة عرابي) was an Egyptian military and national movement of 1881–1882, led by Colonel Ahmad Urabi against Khedive Tawfiq and European control of Egypt's finances.

Urachal carcinoma

Urachal carcinoma (UrC, urachal adenocarcinoma) is a rare cancer of the urachus remnant, under 1% of bladder cancers, incidence 0.04/100,000 person-years, mostly adenocarcinoma, treated by en-bloc partial cystectomy with umbilectomy.

Urachal cyst

Urachal cyst: a fluid-filled remnant of the urachus (allantois-derived bladder-umbilicus cord) with both ends closed and a patent central lumen; usually asymptomatic, prone to infection, rare malignancy risk in adults.

Urachal diverticulum

Urachal diverticulum (vesicourachal diverticulum, ORPHA:431347) is the rarest congenital urachal anomaly, a blind bladder-dome pouch from failed distal urachal closure, usually asymptomatic, managed conservatively first, with excision reserved for persistent symptomatic cases.

Oct 20, 2026

Urachal sinus

Urachal sinus (umbilical-urachal sinus), a congenital urachal anomaly where the umbilical end of the urachus stays open as a blind tract without bladder connection; presents with umbilical discharge, managed conservatively or by excision.

Urachus

The urachus, or median umbilical ligament after obliteration, is the embryonic tube connecting the bladder apex to the umbilicus; failure of obliteration causes patent urachus, urachal cyst, sinus, diverticulum, and rare urachal adenocarcinoma.

Uracil

Uracil (U), a pyrimidine nucleobase (C4H4N2O2, CAS 66-22-8) in RNA that base pairs with adenine and replaces thymine; also a DPD-deficiency biomarker and prebiotic-chemistry target.

Uracil mustard

Uracil mustard (uramustine, NSC-34462) is an oral nitrogen mustard alkylating agent, FDA approved 1962 for CLL, CML, mycosis fungoides, and non-Hodgkin's lymphoma; discontinued 1999; main toxicity thrombocytopenia.

Urad-Gula

Urad-Gula (Urād-Gula) was an exorcist at the Neo-Assyrian royal court under Esarhaddon and Ashurbanipal, son of the chief exorcist Adad-šumu-uṣur, and was later expelled from court service.

Urad-Nanaya

Urad-Nanaya (Urdu-Nanāia, Arad-Nanā) was a scholar-healer and chief physician at the Neo-Assyrian court under King Esarhaddon in the 7th century BC, known from fourteen letters found at Nineveh.

Uraeginthus bengalus

Uraeginthus bengalus, the red-cheeked cordonbleu, is a small African estrildid finch (12.5–13 cm) in which males have red cheek patches and both sexes sing individualistic, unique songs; native to sub-Saharan savannas, introduced in Hawaii, IUCN least concern.

Uraeus

Uraeus (Egyptian iaret): the rearing cobra symbol of protection and royal power in ancient Egypt, embodying the goddess Wadjet of Lower Egypt, worn on pharaohs' foreheads and set on shrine friezes.

Oct 15, 2026

Uragan (satellite bus)

Uragan (Ураган, "hurricane") is the family of satellite buses used for Russia's GLONASS navigation satellites, first launched in 1982 and developed through the Uragan-M and lighter Uragan-K generations.

Uragh Stone Circle

Uragh Stone Circle (Ciorcal Cloch Uragh): Bronze Age five-stone circle, c. 1500 BC, on the Beara Peninsula, County Kerry, between the Cloonee and Gleninchaquin Lakes, with a 3 m standing stone beside its 2.5 m ring and a multiple-stone circle nearby.

Oct 20, 2026

Ural

Ural (Урал; Kazakh Zhayyq; formerly Yaik until 1775), third longest river in Europe at 2,428 km, rising in the southern Ural Mountains and flowing through Russia and Kazakhstan to the Caspian Sea; only free-flowing Caspian tributary, with the basin's last natural sturgeon spawning grounds.

Ural Airlines Flight 178

Ural Airlines Flight 178, known as the Miracle in the Cornfield, landed in a cornfield near Moscow after a bird strike in 2019; all 233 aboard survived.

Oct 22, 2026

Ural Cossack Host

The Ural Cossack Host (Уральское казачье войско), called the Yaik Cossack Host until 1775, was a Cossack force of the Russian Empire settled along the Ural River.

Ural Mountains (Уральские горы)

The Ural Mountains (Уральские горы) are a 2,500 km Russian range forming the conventional Europe-Asia boundary, formed 250-300 million years ago, with Mount Narodnaya (1,895 m) as highest point and over 1,000 mineral types.

Oct 22, 2026

Ural stone-cutting

Ural stone-cutting (уральская камнерезь) is the hardstone carving tradition of the Urals, centered on the Ekaterinburg Lapidary Works, which supplied ornamental stones to the Russian court from 1751.

Ural-4320

The Ural-4320 is a Soviet and Russian 6×6 all-terrain diesel cargo truck built by the Ural Automobile Plant in Miass since 1977, successor to the Ural-375D.

Ural-Altaic languages

Ural-Altaic (Uralo-Altaic) is an abandoned 19th-century language-family proposal joining Uralic with Turkic, Mongolic, and Tungusic, based on typology like agglutination and vowel harmony; no protolanguage can be established, and the similarities reflect contact.