English Words Starting With U

• uredinium

  nounSpecialist
  /ˌjʊərɪˈdɪnɪəm/A specialized fungal structure (spore-producing) within the uredinial stage of rust fungi.
• urediospore

  nounVery Low (C2+)
  /jʊəˈriːdɪəʊˌspɔː/A binucleate, asexual, rust-coloured spore produced by certain rust fungi during the uredinial stage of their life cycle.
• uredium

  nounExtremely Rare
  /jʊəˈriːdɪəm/A specialized structure in the life cycle of rust fungi where urediniospores (a type of asexual spore) are produced.
• uredo

  nounC2
  /jʊˈriːdəʊ/A rust disease in plants caused by a fungus; specifically, a stage in the life cycle of rust fungi where reddish-brown, spore-producing structures appear on the host plant.
• uredo stage

  nounVery Low / Technical
  /jʊəˈriːdəʊ steɪdʒ/A specific phase in the life cycle of certain rust fungi (Pucciniales) where they produce urediniospores, which are the repeating, asexual summer spores responsible for rapid dispersal and infection during the growing season.
• uredosorus

  nounVery Rare
  /jʊˌriːdəʊˈsɔːrəs/A specialized fungal structure that produces urediniospores (a type of repeating spore in rust fungi).
• uredospore

  nounVery Low
  /jʊˈriːdə(ʊ)spɔː/A type of spore produced by rust fungi during the summer stage of their life cycle, capable of reinfecting the same host plant.
• ureide

  nounVery low
  /ˈjʊərɪaɪd/A crystalline compound derived from urea by replacement of one or more hydrogen atoms by an acyl group.
• uremia

  nounLow
  /jʊˈriː.mi.ə/A medical condition involving abnormally high levels of waste products (like urea) in the blood, typically due to kidney failure.
• urena

  nounVery Low
  /jʊˈriːnə/A genus of tropical plants in the mallow family (Malvaceae), typically with yellow flowers and burr-like fruits.
• ureter

  nounC2
  /jʊəˈriːtə/Either of a pair of muscular tubes that carry urine from the kidneys to the bladder.
• ureterolithotomy

  nounC1-C2 / Extremely Low
  /jʊˌriːtərəʊlɪˈθɒtəmi/A surgical operation to remove a stone from the ureter.
• ureterostomy

  nounC2
  /jʊəˌriːtəˈrɒstəmi/A surgical procedure creating an artificial opening from a ureter to the body surface, allowing urine to drain.
• urethane

  nounC2
  /ˈjʊər.ə.θeɪn/A chemical compound, specifically ethyl carbamate, or a synthetic resin derived from polyurethanes, used in coatings, foams, and adhesives.
• urethra

  nounLow (C1-C2)
  /jʊˈriːθrə/The duct through which urine is discharged from the bladder to the exterior of the body.
• urethrectomy

  nounVery Low
  /ˌjʊərɪˈθrɛktəmi/A surgical procedure for the removal of all or part of the urethra.
• urethritis

  nounLow
  /ˌjʊərɪˈθraɪtɪs/Inflammation of the urethra, the tube through which urine leaves the body.
• urethroscope

  nounLow
  /jʊˈriː.θrəˌskəʊp/A medical instrument for viewing the interior of the urethra.
• urethroscopy

  nounVery Low (C2+)
  /ˌjʊə.riˈθrɒs.kə.pi/The medical examination of the inside of the urethra using an optical instrument.
• urethrostomy

  nounLow/Very Low (Specialist Medical Term)
  /ˌjʊərɪˈθrɒstəmi/A surgical procedure to create a permanent opening (stoma) in the urethra to allow urine to exit the body, typically to bypass an obstruction or a damaged section.

Showing 1261–1280 of 1514 words.