Uninsured motorist protectionCovers the insured and family members if injured by a hit-and-run motorist or a motorist without liability protection, if the other driver is at fault.
uninterruptible power supply (UPS)Backup power supply that is available when the electrical power fails or drops to unacceptable levels.
UnionAn organization of workers formed for the purpose of collective bargaining.
uniparental inheritanceThe inheritance of genes exclusively from one parent, e.g. chloroplast DNA is inherited either maternally (many angiosperms) or paternally (most…
unipolar signalA two-state signal where one of the states is represented by voltage or current and the other state is represented by no voltage or current.
UnipotentRefers to a cell that can only develop in a specific way to produce a certain end result.
Unipotent stem cellsStem cells that self-renew as well as give rise to a single mature cell type; e.g., spermatogenic stem cells.
Uniprocessor (UP)A single-processor architecture. See also Symmetric Multiprocessor (SMP).
unique keyKey held only by one crypto-equipment and its associated distribution center.
unique streamA stream whose connection speed, media type, or thinning parameters are different from another stream that is part of the same streaming media…
Unique VisitorA real visitor to a web site. Web servers record the IP addresses of each visitor, and this is used to determine the number of real people who have…
Unique visitorsUnique visitors are a count of individual users who have accessed your web site.
unisexualHigher organisms (animals or plants) possessing either male or female reproductive organs, but not both.
Unit (fuel or pulp)A bulk measure of hog fuel or pulp chips containing 200 cubic feet. A unit contains varying amounts of solid material depending on the amount of…
Unit (timber)A timber harvest area with defined boundaries. The area is managed as a unit for harvest and subsequent management activities.
Unit Control PositionThe WSR-88D radar operator uses this to control the entire radar system. One of the main things that the radar operator will do at the UCP is change…
unit elementIn the representation of a character, a signal element that has a duration equal to the unit interval.
Unit HydrographThe direct runoff hydrograph resulting from a unit depth of excess rainfall produced by a storm of uniform intensity and specified duration.
Unit Hydrograph (or Unitgraph)The discharge hydrograph from one inch of surface runoff distributed uniformly over the entire basin for a given time period.
Unit Hydrograph DurationThe time over which one inch of surface runoff is distributed for unit hydrograph theory.
Unit Hydrograph TheoryUnit Hydrograph Theory states that surface runoff hydrographs for storm events of the same duration will have the same shape, and the ordinates of the…
unit impulseA mathematical artifice consisting of an impulse of infinite amplitude and zero width, and having an area of unity.
unit intervalIn isochronous transmission, the longest interval of which the theoretical durations of the significant intervals of a signal are all whole multiples.
Unit investment trust (UIT)A UIT may be a fixed portfolio of bonds with specific maturity dates, a portfolio of income-producing stocks, or a portfolio of all of the securities…
Unit of tradingWhen you buy stocks, bonds, options and commodities futures, it's typical to buy in a particular volume or a particular dollar value, called a round lot…
Unit TowAn integrated tow consisting of bow, center, and stern sections, generally in the liquid cargo trade.
Unit trustThe category of investment known as a mutual fund in the US is called a unit trust in other parts of the world.
unit trustsA collection of securities, usually bonds, packaged by brokers and sold to investors.
Unit weightWeight per unit volume. See density, dry unit weight, maximum unit weight, saturated unit weight, unit weight of water, wet unit weight.
unit-distance codeAn unweighted code that changes at only one digit position when going from one number to the next in a consecutive sequence of numbers.
Unitary Air ConditionerAn air conditioner consisting of one or more assemblies that move, clean, cool, and dehumidify air.
United StatesIncludes the several States, the District of Columbia, the Commonwealth of Puerto Rico, the Virgin Islands of the United States, American Samoa, Guam, and…
United States AttorneyA federal district attorney appointed by the President to prosecute all offenses committed against the United States; to prosecute or defend the…
United States Code (USC)A compilation of the general and permanent federal laws of the United States. It is divided into 51 titles that represent broad areas subject to federal…
United States Court of AppealsCourts which hear appeals from federal district courts, bankruptcy courts, and tax courts.
United States Magistrate JudgeJudicial officer given authority by 28 U.S.C. 636. This judicial officer hears all preliminary criminal matters, but does not conduct felony trials.
United States Marshals ServiceAgency which serves civil and criminal process in federal courts for those people who have been found to be a pauper.
United States Strategic Command (USSTRATCOM)The DoD unified command responsible for carrying out directed nuclear and nonnuclear strategic air, intercontinental ballistic missile, and sea-launched…
United States Transportation Command (USTRANSCOM)The DoD unified command responsible for providing air, land, and sea transportation for the Department of Defense, both in time of peace and time of war.
United States workerUnited States worker means an employee who is either a citizen or national of the United States, or an alien who is lawfully admitted for permanent…
Unitization Physical and LogicalThe assembly of individually scanned pages into documents. Physical Unitization utilizes actual objects such as staples, paper clips and folders to…
univalentAn unpaired chromosome at the first division of meiosis.
universal donor cellCells that, after introduction into a recipient, will not induce an immune response that leads to their rejection.
Universal Geographic Code(UGC) - UGC's, (e.g. ANZ300 for Western Long Island Sound) are used in many National Weather Service text products to provide geographical information.
Universal Life InsuranceA flexible premium life insurance policy under which the policyholder may change the death benefit from time to time (with satisfactory evidence of…
Universal Precautionsan approach to infection control. According to the concept of Universal Precautions, all human blood and certain human body fluids are treated as if known…
universal restrictionsUniversal restrictions are given the symbol ∀. They constrain the relationships along a given property to individuals that are members of a specific…
universal serviceThe concept of making basic local telephone service (and, in some cases, certain other telecommunications and information services) available at an…
Universal Time (UT)By international agreement, the local time at the prime meridian, which passes through Greenwich, England.
Universal Type Weighting and Recording GageA gage which collects precipitation and then converts the weight onto an inked pen movement which traces on graph paper fixed to a clock driven drum.
universalityReferring to the genetic code, the triplet codon s are translated to the same amino acid, with minor exceptions, in virtually all species.
UniverseIn the world of investments, the word universe refers to a specific group or category of investments that share certain characteristics.
universe polygonThe first record in a polygon attribute table. It represents the area beyond the outer boundary of the coverage.
university researchAll research conducted in the course of an inventor's employment with the University (including, but not limited to, the performance of a grant, contract…
Unlawful detainerA legal action between a landlord and a tenant concerning the right to occupy the premises.
Unlawful Detainer/UDReferred in the past to both the former name of Housing Court and to Eviction Actions.
unliquidated claimA claim for which a specific value has not been determined.
Unlisted itemsLine item used in an appraisal estimate for design changes and to estimate pay items that have little influence on the total cost.
Unlisted securityA security, such as a stock, is unlisted when it does not meet the listing requirements or pay the listing fee of any of the organized exchanges or…