U-boat U-boat is the anglicization of the German language word U-Boot, itself an abbreviation of Unterseeboot . The primary targets of the U-boat campaigns in both world wars were the merchant convoys bringing supplies from Canada and the United States to Europe.
	Uakari Uakari is the common name for the New World monkeys of the genus Cacajao. The common name is believed to come from the indigenous term for "Dutchmen"; their red faces apparently reminded the locals of sun-burned Europeans. Cacajao is also believed to be an indigenous name, of unknown meaning now, as the tribe and language is extinct.
	Udder An udder is the mammary gland organ of cattle and some other mammals, including goats and sheep. A cow has one udder and four teats or nipples, while goats have two teats on their udders. A cow's udder can hold up to around 40 litres of milk, and has a total weight of around 50 kg.
	Ufa Ufa is the capital of the Bashkortostan, Russia. Population: 1,036,026; 1,042,437. Geographical location: . Ufa is one of the industrial centres in the Western Urals area, and is situated at the confluence of the Belaya River and the Ufa Rivers.
	Uganda Uganda, officially the Republic of Uganda, is a country in East Africa, bordered in the east by Kenya, in the north by Sudan, by the Democratic Republic of Congo in the west, Rwanda in the southwest and Tanzania in the south. The southern part of the country includes a substantial portion of Lake Victoria, within which it shares borders with Kenya and Tanzania.
	Ugli fruit An ugli fruit is a citrus fruit created by hybridizing a grapefruit and a tangerine, and is sometimes called uniq fruit or unique fruit. Its species is Mandarin orange x Grapefruit. Native to Jamaica, the fruit was first bred in Brown's Town, Jamaica in 1914.
	Ugliness Ugliness is a property possessed by physical things that are unappealing to the senses, especially visually. It often indicates that something provokes revulsion or horror. The term is commonly used in reference to Human physical appearance. The opposite of ugliness is beauty.
	Uintatherium Uintatherium is an extinct genus of mammals. Fossil remains were discovered near Fort Bridger, Wyoming. This was a large browsing animal, about the size of a rhinoceros. What was most unusual about Uintatherium was its skull which was large and strongly built. The large upper canine tooths were apparently formidable defensive weapons.
	Ukraine Ukraine is a country in Eastern Europe. It borders Russia to the north-east, Belarus to the north, Poland, Slovakia and Hungary to the west, Romania and Republic of Moldova to the south-west and the Black Sea to the south. The historic city of Kiev is the country's capital.
	Ukrainians Ukrainians are an East Slavs ethnic group primarily living in Ukraine.
	Ukulele The ukulele , or uke, is a fretted string instrument which is, in its construction, essentially a smaller, four-stringed version of the guitar. In the early 20th century, the instrument's name was often rendered as ukelele, a spelling still used in Great Britain.
	Ulaanbaatar Ulan Bator, or Ulaanbaatar in Mongolian language, is the capital of the republic of Mongolia. In 2006 its population was estimated at just under a million citizens.
	Ulcer An ulcer is an open sore of the skin, eyes or epithelium, often caused by an initial abrasion and generally maintained by an inflammation and/or an infection. Or in other words, it is a macroscopic discontinuity of the normal epithelium.
	Ulcerative colitis Ulcerative colitis is a form of inflammatory bowel disease . Ulcerative colitis is a form of colitis, a disease of the intestine, specifically the large intestine or colon , that includes characteristic ulcers, or open sores, in the colon. The main symptom of active disease is usually diarrhea mixed with blood, of gradual onset.
	Ulema Ulema refers to the educated class of Muslim scholars engaged in the several fields of Islamic studies. They are best known as the arbiters of Sharia law. While the ulema are well versed in fiqh, some of them also go on to specialize in other sciences, such as Islamic philosophy, kalam or tafsir.
	Ulfilas Ulfilas or Wulfila , bishop, missionary, and translator, was a Goths or half-Goth who had spent time inside the Byzantine Empire at a time when Arianism was dominant. Ulfilas was ordained a bishop by Eusebius of Nicomedia and returned to his people to work as a missionary.
	Ullr In Norse mythology, Ullr#Familiar forms is a son of Sif and a stepson of Thor. While extant sources are scant he appears to have been a major god in prehistoric times, or even an aspect of the head of the Proto-Germanic pantheon, mentioned on the 3rd century Thorsberg chape.
	Ulna The ulna [Figs. 1, 2] is a long bone, prismatic in form, placed at the Anatomical terms of location#Relative directions side of the forearm, parallel with the radius.
	Ultima Ultima is a series of fantasy computer role-playing games from Origin Systems. Ultima was created by Richard Garriott, a.k.a. Lord British. Several games of the series are considered seminal games of their genre. Today, Electronic Arts holds the brand.
	Ultimates The Ultimates are a group of fictional characters, a government-sponsored team of superhero in the Ultimate Marvel Universe, appearing primarily in their self-titled comic book limited series The Ultimates and The Ultimates 2, published by Marvel Comics, written by Mark Millar and drawn by Bryan Hitch.
	ULTra ULTra is a personal rapid transit system from Advanced Transport Systems Ltd in Cardiff, Wales. The system was conceived by Martin Lowson and his design team, and has had £10 million and 100 Man-hour#Man-years put into the project. The ULTra system differs from other PRT concepts in using largely off-the-shelf technologies, such as rubber tyres running on an open guideway, in order to reduce fabrication costs.
	Ultramarine ---- Ultramarine is a blue pigment consisting essentially of a double silicate of aluminium and sodium with some sulfides or sulfates, and occurring in nature as a proximate component of lapis lazuli. Also known in the past as azzurrum ultramarine, azzurrum transmarinum, azzuro oltramarino, azur d'Acre, pierre d'azur, Lazurstein. Current terminology for ultramarine include natural ultramarine , outremer lapis , Ultramarin echt , oltremare genuino , and ultramarino verdadero .
	Ultras The Ultras movement, or simply Ultras, is the name given to organized supporters' groups for sports teams, mostly European and South American supporters of football teams. This fan sub-group appeared in Italy during the late 1960s when football teams reduced ticket prices on certain areas of the stadiums.
	Ultrasound Ultrasound is sound with a frequency greater than the upper limit of human hearing, this limit being approximately 20 Hertz .
	Ultraviolet Ultraviolet light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than soft X-rays. It can be subdivided into near UV , far or vacuum UV , and extreme UV . When considering the effect of UV radiation on human health and the environment, the range of UV wavelengths is often subdivided into UVA , also called Long Wave or "blacklight"; UVB , also called Medium Wave; and UVC , also called Short Wave or "germicidal".
	Ulva Ulva is a privately owned island in the Scotland Inner Hebrides, off the west coast of Isle of Mull. Until the mid-nineteenth century its main industry was kelp collection and export. A church on the island designed by Thomas Telford dates from this period.
	Ulysses S. Grant Ulysses S. Grant was an United States soldier and politician who was elected the 18th President of the United States . He achieved international fame as the leading Union general in the American Civil War. After service in the Mexican War, an undistinguished peacetime military career, and a series of unsuccessful civilian jobs, Grant proved highly successful in training new recruits in 1861.
	Umayyad The Umayyad Dynasty , also "Umawi", was the first dynasty of caliphs of the Islamic empire after the reign of the Rashidun ended.
	Umbel An umbel is an inflorescence which consists of a number of short flower stalks which are equal in length and spread from a common point, somewhat like umbrella ribs. Umbels are a characteristic of plants such as carrot, parsley, dill, and fennel in the family Apiaceae, and ivy, aralia and fatsia in the family Araliaceae.
	Umbellularia Umbellularia californica is a tree native to coastal forests of western North America. Its pungent leaves have a similar flavor to bay leaf, and it may be mistaken for Bay Laurel. In Oregon, this tree is known as Oregon Myrtle, while in California it is called California Bay Laurel, which may be shortened to California Bay or California Laurel.
	Umber Umber is a natural brown clay pigment which contains iron and manganese oxides. The color becomes more intense when calcined, and the resulting pigment is called burnt umber. The name derives from Umbria, a mountainous region of central Italy, but it is found in many parts of the world.
	Umbilical cord In placental mammals, the umbilical cord is a tube that connects a developing embryo or fetus to its placenta. It contains one or two major veins, buried within Wharton's jelly, for the exchange of nutrient- and oxygen-rich blood between the embryo and placenta.
	Umbra The umbra is the darkest part of a shadow. From within the umbra, the source of light is completely blocked by the object causing the shadow. This contrasts with the penumbra, where the light source is only partially blocked and there is only a partial shadow. The umbra is also the comparatively dark central region of a sunspot.
	Umbrella An umbrella is a device used to keep rain off a person. They can be made by stretching a cloth or other material over a wire frame. The person is kept dry by the fabric which is usually water proof and water rolls off the sides. Umbrellas carried by hand are now usually used as rain shields, although their first use was for shielding from the sun; however, as sun tanning became more sociably acceptable, this usage declined.
	Umbrella magnolia The Umbrella magnolia is a deciduous tree native to the southeastern United States in the Allegheny Mountains region. Umbrella magnolias have large shiny leaf 30-50 cm long, spreading from stout Plant stem. In a natural setting the Umbrella magnolia can grow 15 m tall.
	Umbria Umbria is a region of central Italy, bordered by Tuscany to the west, the Marche to the east and Latium to the south. The region covers 8,456 km and has a population of 834,000 . The region is named for the Umbri tribe, who settled in the region in the 6th century BC.
	Unaí Una? is a city and municipality in northern Minas Gerais state, Brazil. *Postal Code: 38610-000
	Unappreciated This article is about the album. For the song see, Unappreciated. "Unappreciated is the debut studio album by American R&B/Hip-Hop group, Cherish. So far, Cherish has released their latest song "Do It To It" featuring Sean Paul from Youngbloodz. Do It To It has so far peaked at #12 in the U.S Billboard Hot 100.
	Unbalanced Unbalanced is the opposite of balanced. * When referring to electrical signals, an unbalanced line is the opposite of a balanced line such as used in RCA cables used to connect a DVD player to your stereo. * In New Age and Metaphysics the term may refer to unbalanced Chakras and problems related to Aura and Qi energy.
	Uncensored Uncensored was an annual professional wrestling pay-per-view from World Championship Wrestling, held in the month of March from 1995 through 2000. It was replaced in 2001 by WCW Greed. The recurring concept of Uncensored was that it was an event that, in storylines, the WCW Board of Directors had washed their hands of.
	Uncertainty principle In quantum physics, the Heisenberg uncertainty principle or the Heisenberg indeterminacy principle the latter name given to it by Niels Bohr states that one cannot measure values of certain conjugate quantities, which are pairs of observables of a single elementary particle.
	Uncial Uncial is a majuscule script commonly used from the 3rd century to 8th century centuries AD by Latin and Byzantine Empire scribes. From the 8th century to the 13th century the script was more often used as a display script in headings and titles.
	Uncle Sam Uncle Sam is a national personification of the United States dating from the War of 1812. Common folklore holds that his origins trace back to soldiers stationed in upstate New York, who would receive barrels of meat stamped with the initials U.S. The soldiers jokingly referred to it as the initials of the meat supplier, Uncle Samuel Wilson, of Troy, New York.
	Undeclared Undeclared was a United States television series that aired on Fox Broadcasting Company during the 2001–2002 TV season. The half-hour dramedy/sitcom was Judd Apatow's follow-up to the TV cult classic Freaks and Geeks. Undeclared centered on a group of college freshmen at the fictitious University of North Eastern California.
	Underarm The underarm is the area on the human body directly under the joint where the arm connects to the shoulder. Anatomically, the axilla is bound anteriorly by the pectoralis major muscle and pectoralis minor muscle muscles, posteriorly by the subscapularis muscle and the scapula, medially by the ribcage and by the serratus anterior muscle, and laterally by the coracobrachialis muscle and the short head of the biceps brachii muscle
	Undercarriage - ||- ||- ||- ||} The undercarriage or landing gear is the structure that supports an aircraft when it is taxiing or stationary. The assembly usually has wheels and some sort of shock absorber apparatus, but sometimes skis for snow or seaplanes for water, and skids or pontoons.
	Underclassman Underclassman is a 2005 in film film Film director by Marcos Siega. The plot is about a young detective who goes undercover at an elite private school to destroy an international stolen car ring. *Tagline: Get ready to be schooled.
	Undercut The undercut is a haircut much like a bowl cut except the ridge of the bowl is not where the cutting ends. The ridge of the bowl is lifted so the hair is clipper cut further up the side of the head an additional one to two inches. This allows the head to be shaken and the bowl look will always return to its regular shape.
	Underdog Underdog was an United States animated television series that debuted on October 3, 1964, on the NBC network and continued until 1973 for a run of approximately 120 episodes over NBC, and occasionally, CBS.
	Undergarment Undergarments, also called "underwear", "lingerie" , or sometimes "intimate clothing" and "pants" in British English are clothes worn next to the skin, usually under other clothes.
	Undergrads mage = | caption = Undergrads logo | rating = | format = Animated comedy | runtime = 0:22 per episode | creator = Pete Williams | starring = Pete WilliamsSusan DaltonJene YeoYannick BissonJosh A. Cagan | country = United States,Canada | network = MTVTeletoon
	Underground press The phrase underground press, especially underground newspapers is most often used in reference to the Alternative media, independently published and distributed, associated with the counterculture movements of the late 1960s and early 1970s.
	Underground Railroad The Underground Railroad was a network of secret passage by which African slavery in the 19th century United States attempted to escape to free states, or as far north as Canada, with the aid of abolitionists. Other routes led to Mexico or overseas.
	Underline An underline is one or more horizontal lines immediately below a portion of text. Single, and occasionally double, underlining was originally used in hand-written or typewriter documents to emphasise text. In a manuscript to be typeset, various forms of underlining were conventionally used to indicate that text should be set in a special typeface such as italic type to show emphasis, part of a procedure known as markup language#History.
	Underwater Underwater, sometimes shortened as U/W, is a term describing the realm below the surface of water where the water exists in a natural feature such as an ocean, sea, lake, pond, or river. Three quarters of the planet earth is covered by water. A majority of the planet's solid surface is abyssal plain, at depths between 4000 and 5500 m below the surface of the oceans.
	Underwater archaeology Underwater archaeology is the study of past human life, behaviours and cultures using the physical remains found in Sea water or fresh water or buried beneath water-logged sediment. It is most often considered as a branch of maritime archaeology. Underwater archaeological sites consist of wrecks , the remains of structures created in water or places where people once lived on land that have been subsequently covered by water due to rising Sea level or other phenomena.
	Unearth Unearth is a metalcore band from Winthrop, Massachusetts. Their debut album, The Stings of Conscience, was a popular offering in the underground metalcore scene. Their music is categorised by complex, harmonized guitar riffs, harmmony-oriented bass riffs, rapid kicks, non-throaty screaming, and politically based lyrics.
	Unearthly Unearthly is an shojo Original English-language manga series written by Ted Naifeh, with art by Elmer Damaso and is published by Seven Seas Entertainment.
	Unemployment In economics, a person willing to work at a prevailing wage rate yet is unable to find a paying employment is considered to be unemployed. The unemployment rate is the number of unemployed workers divided by the total civilian labor force, which includes both the unemployed and those with jobs .
	UNESCO UNESCO is a specialized agency of the United Nations established in 1945. Its purpose is to contribute to peace and security by promoting international collaboration through education, science, and culture in order to further universal respect for justice, the rule of law, and the human rights and fundamental Freedom proclaimed in the United Nations Charter .
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	Ungulate Ungulates are mammals that use the tip of their toes, usually hoofed, to sustain the whole bodyweight while moving. They make up several Order of mammals, of which six to eight survive. There is some dispute as to whether ungulate should be treated as an actual cladistic group, or merely a phenetics group , in light of the fact that all ungulates do not appear to be as closely related as once believed .
	Unhallowed Unhallowed is an album by the melodic death metal band The Black Dahlia Murder. It was released by Metal Blade on June 17, 2003.
	Unhinged Unhinged is the name of one of the few English language-only expansions to the game '. It is a humorous parody set, and is far less serious than traditional Magic expansions. Mark Rosewater, lead designer for Magic the Gathering, has written in several articles that due to the nature of humor and many plays-on-words used in both Unhinged and Unglued, sets such as these will always be English language only.
	Unicorn The unicorn is a legendary creature usually depicted with the body of a horse, but with a single usually spiral Horn growing out of its forehead . The unicorn's blood and horn are supposedly mystical healers.
	Unicycle A unicycle is a one-wheeled human powered vehicle. Unicycles are similar to, but less complex than, bicycles.
	Unidentified flying object A UFO or Unidentified Flying Object is any real or apparent flying object which cannot be identified by the observer and which remains unidentified after investigation. Sightings of unusual aerial phenomena date back to ancient times, but reports of UFO sightings only became fashionable after the first widely publicized U.S.
	UniModal UniModal or SkyTran is a hypothetical concept by Douglas Malewicki for a 160km/h personal rapid transit system. The Unimodal system design includes a number of technologies which are either unproven or untried in comparable situations. Such technologies include speech recognition to interact with riders, and electric linear propulsion using a form of passive magnetic levitation called Inductrack.
	Union Army The Union Army refers to the United States Army during the American Civil War. The Union Army is also known as the Northern Army or the Federal Army.
	Union Flag |}