Glossary · Nouns · U
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TermTypeDefinitionClassificationsUpdated
Uranyl NitratenounMWEa yellow salt obtained by the reaction of uranium salts with nitric acidverified
Urarthritisnouna painful inflammation of the big toe and foot caused by defects in uric acid metabolism resulting in deposits of the acid and its salts in the blood and jointsverified
Urban LegendnounMWEa story that appears mysteriously and spreads spontaneously in various forms and is usually falseverified
Urban PlanningnounMWEdetermining and drawing up plans for the future physical arrangement and condition of a communityverified
Urban TyphusnounMWEacute infection caused by rickettsia and transmitted by the bite of an infected fleaverified
Urea-Formaldehyde ResinnounMWEa clear thermosetting resin made from urea and formaldehyde and used in electrical fittings, adhesives, and finishesverified
Uremianounaccumulation in the blood of nitrogenous waste products (urea) that are usually excreted in the urineverified
Ureternouneither of a pair of thick-walled tubes that carry urine from the kidney to the urinary bladderverified
Urge IncontinencenounMWEurinary incontinence that is generally attributable to involuntary contracts of the bladder muscle resulting in an urgent need to urinate accompanied by a sudden loss of urineverified
Urinary ApparatusnounMWEthe system that includes all organs involved in reproduction and in the formation and voidance of urineverified
Urinary OrgannounMWEan organ that separates waste substances from the blood and discharges themverified
Urinary SystemnounMWEthe system that includes all organs involved in reproduction and in the formation and voidance of urineverified
Uriniferous TubulenounMWEany of the small tubules that are the excretory units of the vertebrate kidneyverified
Urobilinnounbrown bile pigment formed from urobilinogens and found in feces and in small amounts in urineverified
Urochordnounprimitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larvaverified
Urochordatenounprimitive marine animal having a saclike unsegmented body and a urochord that is conspicuous in the larvaverified
Urogenital ApparatusnounMWEthe system that includes all organs involved in reproduction and in the formation and voidance of urineverified
Urogenital MedicinenounMWEthe branch of medicine that deals with the diagnosis and treatment of disorders of the urinary tract or urogenital systemverified
Urogenital SystemnounMWEthe system that includes all organs involved in reproduction and in the formation and voidance of urineverified
Urokinasenounprotease produced in the kidney that converts plasminogen to plasmin and so initiates fibrinolysisverified
Urologynounthe branch of medicine that deals with the diagnosis and treatment of disorders of the urinary tract or urogenital systemverified
Ursine DasyurenounMWEsmall ferocious carnivorous marsupial having a mostly black coat and long tailverified
Ursinianounany of various plants of the genus Ursinia grown for their yellow- or orange- or white-rayed flowersverified
Urticarianounan itchy skin eruption characterized by weals with pale interiors and well-defined red marginsverified
Urticationnounan itchy skin eruption characterized by weals with pale interiors and well-defined red marginsverified
US-CERTnounA partnership between the Department of Homeland Security and the public and private sectors, established to protect the nation's Internet infrastructure. US-CERT coordinates defense against and responses to cyber attacks across the nation.Organization
USA Patriot ActnounMWEThe USA PATRIOT Act (Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act of 2001 (Public Law Pub.L. 107-56), commonly known as the "Patriot Act", was enacted by Congress to deter and punish terrorist acts in the United States and around the world by enhancing the law enforcement investigatory tools of both domestic law enforcement and foreign intelligence agencies.RequirementRegulatedCUI
Usabilitynounextent to which a system product or service can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use (note 1: The “specified” users, goals and context of use refer to the particular combination of users, goals and context of use for which usability is being considered; note 2: used as a qualifier to refer to the design knowledge, competencies, activities and design attributes that contribute to usability, such as usability expertise, usability professional, usability engineering, usability method, usability evaluation, usability heuristic). [See also: ISO/IEC 9241-11 Ergonomic of Human-System Interaction — Part 11: Usability: Definitions and Concepts. ISO, Geneva, Switzerland, 2018, https://www.iso.org/standard/63500.html.]Capability
Usability TestingnounMWErefers to evaluating a product or service by testing it with representative users. Typically, during a test, participants will try to complete typical tasks while observers watch, listen and takes notes. The goal is to identify any usability problems, collect qualitative and quantitative data and determine the participant's satisfaction with the product.Process
usagenounThe action of being used, the manner in which something is used, or the amount of something that is used.Metric
Usancenounthe period of time permitted by commercial usage for the payment of a bill of exchange (especially a foreign bill of exchange)verified
Use of Goods and ServicesnounMWE(economics) the utilization of economic goods to satisfy needs or in manufacturingverified