English Words Starting With U

• ural owl

  nounC2
  /ˌjʊər.əl ˈaʊl/A large Eurasian owl (Strix uralensis) with a distinctive long tail and pale plumage, inhabiting dense forests from Scandinavia to Japan.
• ural-altaic

  adjectivenounC2
  /ˌjʊər.æl.ælˈteɪ.ɪk/A hypothetical or disputed language family grouping the Uralic and Altaic language families together.
• uralian emerald

  nounVery low
  /jʊˈreɪ.li.ən ˈem.ə.rəld/A high-quality emerald gemstone historically mined in the Ural Mountains of Russia.
• uralic

  adjectivenounC1/C2 (Academic/Low-Frequency)
  /jʊəˈrælɪk/Relating to a major language family of northern Eurasia.
• uralite

  nounVery Rare
  /ˈjʊərəlaɪt/A mineral alteration product, where pyroxene is pseudomorphically replaced by amphibole.
• uralsk

  nounLow (primarily appears in geographical, historical, or travel contexts)
  /jʊəˈrælsk/A city in northwestern Kazakhstan, located on the Ural River.
• uran

  nounExtremely Rare
  /ˈjʊərən/The sky; a hypothetical celestial substance or element.
• uranalysis

  nounVery Low / Obscure
  /ˌjʊər.ɪˈnæl.ə.sɪs/A mistaken or humorous creation, blending 'urine' and 'analysis', representing a non-standard, misspelled, or misheard form of the medical term 'urinalysis'.
• urania

  nounRare
  /jʊˈreɪ.ni.ə/In Greek mythology, the Muse of astronomy and celestial objects; used as a symbolic name for astronomy or the celestial realm.
• uranian

  adjectivenounC2
  /jʊəˈreɪniən/Relating to the planet Uranus; or, relating to or characteristic of the heavens or sky (archaic). Also used in specific historical contexts relating to homosexuality.
• uranic oxide

  nounRare / Obsolete / Historical
  /jʊˌɹæn.ɪk ˈɒk.saɪd/A specific, now obsolete term for a compound of uranium, historically referring to uranium trioxide (UO₃).
• uranide

  nounC2 / Very Rare
  /ˈjʊərənaɪd/Any element in the series of actinide elements in the periodic table, from actinium to lawrencium.
• uraninite

  nounC2
  /jʊˈreɪ.nɪ.naɪt/A heavy, dark, radioactive mineral, primarily composed of uranium dioxide (UO₂), and the principal ore of uranium.
• uraniscus

  nounExtremely Rare / Technical
  /ˌjʊərəˈnɪskəs/The palate, specifically the roof of the mouth.
• uranism

  nounRare/Obsolete
  /ˈjʊərənɪz(ə)m/a now-archaic term historically used to refer to male homosexuality or same-sex attraction between men.
• uranite

  nounRare
  /ˈjʊərənaɪt/A mineral that is a phosphate of uranium and another element (such as calcium or copper); a source of uranium and radium.
• uranite group

  nounVery low
  /ˈjʊər.ə.naɪt ɡruːp/A group of phosphate and arsenate minerals containing uranium as an essential component, notably including autunite and torbernite.
• uranium

  nounC1
  /jʊˈreɪ.ni.əm/A heavy, silvery-white, radioactive metallic chemical element with atomic number 92, used as a fuel in nuclear reactors and weapons.
• uranium 235

  nounC1
  /jʊˈreɪ.ni.əm tuː ˈθɜːti.faɪv/A specific radioactive isotope of uranium with an atomic mass of 235, capable of sustaining a nuclear fission chain reaction.
• uranium 238

  nounC1
  /jʊˈreɪ.ni.əm ˌtuː.ˌθɜː.tiˈeɪt/A specific, naturally occurring isotope of uranium with atomic number 92 and mass number 238; the most abundant isotope of uranium.

Showing 1181–1200 of 1514 words.